Bodybuilding.com Information Motivation Supplementation
in:

    The World’s #1 Bodybuilding And Fitness Forum - Save Up To 50% Off Retail Prices In Our Bodybuilding.com Store!

Reply
Page 1 of 3 1 2 3 LastLast
Results 1 to 30 of 63
  1. #1
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline

    Need Physics Help(5 problems)[will rep]

    Don't care about the work being showed right now. I just need answers by 11:59 The fifth question is attached and includes a picture. Will rep for correct answers.




    2. How much work is done by the motor in a CD player to make a CD spin, starting from rest? The CD has a diameter of 12.2 cm and a mass of 15.6 g. The laser scans at a constant tangential velocity of 1.14 m/s. Assume that the music is first detected at a radius of 19.8 mm from the center of the disk. Ignore the small circular hole at the CD's center.

    5. A playground merry-go-round made in the shape of a solid disk, has a diameter of 2.64 m and a mass of 350.1 kg. Two children, each of mass 30.0 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses.

    (a) What torque is required to bring the merry-go-round from rest to 29 rpm in 19.5 s?

    (b) If two other bigger children are going to push on the merry-go-round rim to produce this acceleration, with what force magnitude must each child push?


    6. A solid sphere of mass 0.604 kg rolls without slipping along a horizontal surface with a translational speed of 5.28 m/s. It comes to an incline that makes an angle of 38? with the horizontal surface. Neglect energy losses due to friction.

    (a) What is the total energy of the rolling sphere?

    (b) To what vertical height above the horizontal surface does the sphere rise on the incline?


    9. A uniform disk with a mass of 815 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 105 g clod of clay on a point 7.50 cm from the center of the disk, where it sticks. What is the new rotational speed of the disk?
    Attached Images
    Last edited by Lunatic; 11-02-2009 at 09:06 PM.
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  2. #2
    my job title is douchebag Iukas's Avatar
    Join Date: Jun 2009
    Location: United States
    Age: 23
    Stats: 6'1", 181 lbs
    Posts: 10,668
    Rep Power: 13083
    Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000) Iukas has reached the pinnacle! Best possible rank! (+1000000)
    Visit Iukas's BodySpace
    Iukas is offline
    1st
    by the way i do not know physics at all, just wanted to be first.
    Reply With Quote

  3. #3
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by Iukas View Post
    1st
    by the way i do not know physics at all, just wanted to be first.
    Gay
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  4. #4
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    bump for title change
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  5. #5
    WTF IS JUICE? berserkbladex's Avatar
    Join Date: Apr 2007
    Location: Dallas, Texas, United States
    Age: 24
    Stats: 5'9"
    Posts: 450
    BodyPoints: 2255
    Rep Power: 47
    berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000) berserkbladex has much to be proud of. One of the best! (+20000)
    Visit berserkbladex's BodySpace
    berserkbladex is offline
    Originally Posted by Lunatic View Post
    Don't care about the work being showed right now. I just need answers by 11:59 The fifth question is attached and includes a picture. Will rep for correct answers.




    2. How much work is done by the motor in a CD player to make a CD spin, starting from rest? The CD has a diameter of 12.2 cm and a mass of 15.6 g. The laser scans at a constant tangential velocity of 1.14 m/s. Assume that the music is first detected at a radius of 19.8 mm from the center of the disk. Ignore the small circular hole at the CD's center.

    5. A playground merry-go-round made in the shape of a solid disk, has a diameter of 2.64 m and a mass of 350.1 kg. Two children, each of mass 30.0 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses.

    (a) What torque is required to bring the merry-go-round from rest to 29 rpm in 19.5 s?

    (b) If two other bigger children are going to push on the merry-go-round rim to produce this acceleration, with what force magnitude must each child push?


    6. A solid sphere of mass 0.604 kg rolls without slipping along a horizontal surface with a translational speed of 5.28 m/s. It comes to an incline that makes an angle of 38? with the horizontal surface. Neglect energy losses due to friction.

    (a) What is the total energy of the rolling sphere?

    (b) To what vertical height above the horizontal surface does the sphere rise on the incline?


    9. A uniform disk with a mass of 815 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 105 g clod of clay on a point 7.50 cm from the center of the disk, where it sticks. What is the new rotational speed of the disk?
    2. .0529550685 j


    sorry dude got a test tomorrow so thats all i had time for
    Reply With Quote

  6. #6
    Registered User LAballin24's Avatar
    Join Date: Jul 2009
    Age: 27
    Posts: 4,940
    Rep Power: 3176
    LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000) LAballin24 has reached the pinnacle! Best possible rank! (+1000000)
    Visit LAballin24's BodySpace
    LAballin24 is offline
    Dont remember sht from physics but here is a bump.
    Reply With Quote

  7. #7
    500 Internal Server Error jujuB's Avatar
    Join Date: Apr 2008
    Location: Georgia, United States
    Stats: 6'0", 185 lbs
    Posts: 16,273
    Rep Power: 26044
    jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000)
    Visit jujuB's BodySpace
    jujuB is offline
    i have a damn physics test on friday

    brb failing it, and prof. curving it so I get a C lol
    SnapChat: iron_donkey

    RIP mainsqueeze530 1991-2013

    need a vehicle history report? PM ME
    Reply With Quote

  8. #8
    Stay thirsty my friends Misc_Canuck's Avatar
    Join Date: Feb 2009
    Stats: 99999'2", 1 lbs
    Posts: 5,693
    Rep Power: 2743
    Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000) Misc_Canuck has reached the pinnacle! Best possible rank! (+1000000)
    Visit Misc_Canuck's BodySpace
    Misc_Canuck is offline
    only phy 12 sawwy
    RIP Zyzz (made by me): http://zyzzhnng.ytmnd.com/
    Reply With Quote

  9. #9
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by berserkbladex View Post
    2. .0529550685 j


    sorry dude got a test tomorrow so thats all i had time for
    Didn't work
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  10. #10
    500 Internal Server Error jujuB's Avatar
    Join Date: Apr 2008
    Location: Georgia, United States
    Stats: 6'0", 185 lbs
    Posts: 16,273
    Rep Power: 26044
    jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000) jujuB has reached the pinnacle! Best possible rank! (+1000000)
    Visit jujuB's BodySpace
    jujuB is offline
    well

    torque = force x lever arm (radius?)

    you on the mastering physics thing?
    SnapChat: iron_donkey

    RIP mainsqueeze530 1991-2013

    need a vehicle history report? PM ME
    Reply With Quote

  11. #11
    Hey im polish too Deathstriker666's Avatar
    Join Date: Feb 2007
    Location: Australia
    Age: 23
    Stats: 5'9", 167 lbs
    Posts: 4,591
    BodyPoints: 418
    Rep Power: 675
    Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit Deathstriker666's BodySpace
    Deathstriker666 is offline
    ill do it mann, ill edit this post when im done. edit: for q6, the radious of the sphere isnt given. So the energy cant be worked out.
    Reply With Quote

  12. #12
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by juju_BEAN View Post
    well

    torque = force x lever arm (radius?)

    you on the mastering physics thing?
    It's WebAssign. Get 4 chances to do the problem before it being counted against you.

    Originally Posted by Deathstriker666 View Post
    ill do it mann, ill edit this post when im done. edit: for q6, the radious of the sphere isnt given. So the energy cant be worked out.
    I copy and pasted so I dunno
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  13. #13
    Registered User ausluke's Avatar
    Join Date: Oct 2008
    Location: Sydney, NSW, Australia
    Age: 24
    Stats: 5'6", 143 lbs
    Posts: 6,348
    Rep Power: 2660
    ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000)
    Visit ausluke's BodySpace
    ausluke is offline
    2) 0.002169648 J
    havn't done physics since high school so probably isn't correct but i dunno maybe :P
    Reply With Quote

  14. #14
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    I have this one worked out but it's wrong. I did it the same way my fraternity brother did it but I got it wrong and he got it right.

    What is the rotational inertia of a solid iron disk of mass 47 kg, with a thickness of 6.16 cm and radius of 18.8 cm, about an axis through its center and perpendicular to it?

    Any help? All other problems are done.
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  15. #15
    Registered User colt.45's Avatar
    Join Date: Sep 2007
    Age: 24
    Posts: 11,205
    BodyPoints: 11537
    Rep Power: 963
    colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit colt.45's BodySpace
    colt.45 is offline
    Last year I knew al this ****, now I cant remember a damn thing
    Reply With Quote

  16. #16
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by ausluke View Post
    2) 0.002169648 J
    havn't done physics since high school so probably isn't correct but i dunno maybe :P
    **** yoooooooooooou didn't work
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  17. #17
    Registered User dantheman999's Avatar
    Join Date: May 2008
    Location: Canada
    Age: 28
    Stats: 5'9", 198 lbs
    Posts: 4,445
    Rep Power: 929
    dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000) dantheman999 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit dantheman999's BodySpace
    dantheman999 is offline
    To late to give it a shot?

    Master mech eng here.

    EDIT: I see the time now, seems i missed it. Theres no way anyone could have answered all those in 8 minutes, unless they work on this **** regularly. Probably take half an hour just to look up the stuff again.
    Reply With Quote

  18. #18
    Registered User Abitofmuscle's Avatar
    Join Date: Mar 2008
    Posts: 2,190
    Rep Power: 3583
    Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000)
    Abitofmuscle is offline
    For the last one with the picture I got

    A = 2.148 KN downward
    B = 3.296 KN upward

    I assumed that you represent the mass of the board as a concentrated force in the middle of the board.

    If you use distributed forces for weights then the answers would change.
    Reply With Quote

  19. #19
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by dantheman999 View Post
    To late to give it a shot?

    Master mech eng here.
    got 37 minutes!!
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  20. #20
    Registered User colt.45's Avatar
    Join Date: Sep 2007
    Age: 24
    Posts: 11,205
    BodyPoints: 11537
    Rep Power: 963
    colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit colt.45's BodySpace
    colt.45 is offline
    Originally Posted by dantheman999 View Post
    To late to give it a shot?

    Master mech eng here.
    wat school brah?
    Reply With Quote

  21. #21
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by Abitofmuscle View Post
    For the last one with the picture I got

    A = 2.148 KN downward
    B = 3.296 KN upward

    I assumed that you represent the mass of the board as a concentrated force in the middle of the board.

    If you use distributed forces for weights then the answers would change.
    I ****ing love you. Repped. Care to try others?
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  22. #22
    Crazy Asian tehmaestro's Avatar
    Join Date: Feb 2009
    Location: Auburn, Alabama, United States
    Age: 25
    Stats: 5'9", 160 lbs
    Posts: 181
    Rep Power: 1189
    tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000)
    Visit tehmaestro's BodySpace
    tehmaestro is offline
    Originally Posted by Abitofmuscle View Post
    For the last one with the picture I got

    A = 2.148 KN downward
    B = 3.296 KN upward

    I assumed that you represent the mass of the board as a concentrated force in the middle of the board.

    If you use distributed forces for weights then the answers would change.
    **** I just did this one, LOL
    Reply With Quote

  23. #23
    Registered User ausluke's Avatar
    Join Date: Oct 2008
    Location: Sydney, NSW, Australia
    Age: 24
    Stats: 5'6", 143 lbs
    Posts: 6,348
    Rep Power: 2660
    ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000)
    Visit ausluke's BodySpace
    ausluke is offline
    6a) 8.42J
    if thats not right i dunno what is!
    Reply With Quote

  24. #24
    Crazy Asian tehmaestro's Avatar
    Join Date: Feb 2009
    Location: Auburn, Alabama, United States
    Age: 25
    Stats: 5'9", 160 lbs
    Posts: 181
    Rep Power: 1189
    tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000) tehmaestro has reached the pinnacle! Best possible rank! (+1000000)
    Visit tehmaestro's BodySpace
    tehmaestro is offline
    6b) is 1.421m
    Reply With Quote

  25. #25
    Registered User colt.45's Avatar
    Join Date: Sep 2007
    Age: 24
    Posts: 11,205
    BodyPoints: 11537
    Rep Power: 963
    colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit colt.45's BodySpace
    colt.45 is offline
    Originally Posted by ausluke View Post
    6a) 8.42J
    if thats not right i dunno what is!
    unless you took into account the moment of intertia its gonna be wrong.

    You need the term 1/2Iw^2 as well as 1/2mv^2 in there I'm fairly sure
    Reply With Quote

  26. #26
    Registered User Abitofmuscle's Avatar
    Join Date: Mar 2008
    Posts: 2,190
    Rep Power: 3583
    Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000) Abitofmuscle has reached the pinnacle! Best possible rank! (+1000000)
    Abitofmuscle is offline
    Originally Posted by Lunatic View Post
    I ****ing love you. Repped. Care to try others?
    Can't figure out the others. I'm sure some misc physics guru brahs will come to help though.
    Reply With Quote

  27. #27
    Registered User ausluke's Avatar
    Join Date: Oct 2008
    Location: Sydney, NSW, Australia
    Age: 24
    Stats: 5'6", 143 lbs
    Posts: 6,348
    Rep Power: 2660
    ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000) ausluke has reached the pinnacle! Best possible rank! (+1000000)
    Visit ausluke's BodySpace
    ausluke is offline
    lol then its wrong
    Reply With Quote

  28. #28
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by ausluke View Post
    6a) 8.42J
    if thats not right i dunno what is!
    Originally Posted by tehmaestro View Post
    6b) is 1.421m
    Both wrong
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

  29. #29
    Hey im polish too Deathstriker666's Avatar
    Join Date: Feb 2007
    Location: Australia
    Age: 23
    Stats: 5'9", 167 lbs
    Posts: 4,591
    BodyPoints: 418
    Rep Power: 675
    Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000) Deathstriker666 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit Deathstriker666's BodySpace
    Deathstriker666 is offline
    Originally Posted by Lunatic View Post
    I have this one worked out but it's wrong. I did it the same way my fraternity brother did it but I got it wrong and he got it right.

    What is the rotational inertia of a solid iron disk of mass 47 kg, with a thickness of 6.16 cm and radius of 18.8 cm, about an axis through its center and perpendicular to it?

    Any help? All other problems are done.
    = I = 0.5m(r^2)
    = 0.830584, assuming the axis is down the middle. If its like through the side

    I = (1/12)m(3(r^2)+(h^2))
    = 0.45987808
    Reply With Quote

  30. #30
    Disabled Miscr Lunatic's Avatar
    Join Date: Feb 2106
    Location: United States
    Stats: 2'7", 230 lbs
    Posts: 44,048
    BodyPoints: 36180
    Rep Power: 217164
    Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000) Lunatic has reached the pinnacle! Best possible rank! (+1000000)
    Visit Lunatic's BodySpace
    Lunatic is offline
    Originally Posted by Deathstriker666 View Post
    = I = 0.5m(r^2)
    = 0.830584, assuming the axis is down the middle. If its like through the side

    I = (1/12)m(3(r^2)+(h^2))
    = 0.45987808
    So which is the answer?
    ΘΧ Θηρόποσα Χείρ ΘΧ

    RIP Slash_

    ***Black Jesus Fan Club***

    If you don't know or can't figure out the differences between you're/your/there/they're/their.... please go slam your head against a brick wall.
    Reply With Quote

Reply
Page 1 of 3 1 2 3 LastLast

Similar Threads

  1. Need Physics Help (REPS)
    By agile321 in forum Misc.
    Replies: 6
    Last Post: 02-26-2009, 02:50 PM
  2. Replies: 21
    Last Post: 11-25-2008, 06:44 PM
  3. Need physics help (free falling) (reps)
    By agile321 in forum Misc.
    Replies: 25
    Last Post: 10-14-2008, 06:25 PM
  4. Need physics help! (reps)
    By jaberocs in forum Misc.
    Replies: 13
    Last Post: 09-12-2008, 02:02 AM
  5. I need physics help! (reps and thanks!)
    By gr8fubar420 in forum Misc.
    Replies: 2
    Last Post: 03-05-2007, 05:19 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Home Store Products Careers Help Contact Us Terms of Use Checkout