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  1. #1
    Popopopopopopo toledos's Avatar
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    Who likes physics? :)

    001 (part 1 of 2) 10.0 points
    A ball is thrown straight up with an initial
    speed of 70 m/s.
    How high does it go? Assume the accelera-
    tion of gravity is 10 m/s2 . Answer in units of
    m.


    002 (part 2 of 2) 10.0 points
    How long is it in the air? Answer in units of
    s.


    003 (part 1 of 3) 10.0 points
    What is the magnitude of the instantaneous
    velocity (speed) of a freely falling object 34 s
    after it is released from a position of rest?
    Consider the acceleration of gravity to be
    10 m/s2 . Answer in units of m/s.


    004 (part 2 of 3) 10.0 points
    What is its average speed during this 34 s
    interval? Answer in units of m/s.


    005 (part 3 of 3) 10.0 points
    How far will it fall during this time? Answer
    in units of m.


    006 10.0 points
    During a baseball game, a batter hits a high
    pop-up.
    The acceleration of gravity is 9.8 m/s2 .
    If the ball remains in the air for 5.24 s, how
    high does it rise? Answer in units of m.


    007 10.0 points
    A stone is dropped from rest at the top of a
    mine shaft. It takes 55 s for a stone to fall to
    the bottom of a mine shaft.
    The acceleration of gravity is 9.8 m/s2 .
    How deep is the shaft? Answer in units of
    m.


    008 10.0 points
    An object is dropped from rest.
    The acceleration of gravity is 9.8 m/s2 .
    What is its instantaneous speed when it has
    been in motion for 6 s? Answer in units of
    m/s.


    009 10.0 points
    An object is dropped from rest.
    The acceleration of gravity is 9.8 m/s2 .
    What is the acceleration after 6 s? Answer
    in units of m/s2.


    010 10.0 points
    An object is falling freely.
    The acceleration of gravity is 9.8 m/s2 .
    How much gain in speed each second does
    it acquire? Answer in units of m/s.
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  2. #2
    Popopopopopopo toledos's Avatar
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    I really just need #1...
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  3. #3
    Registered User B-Neva's Avatar
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    lol I remember physics was just plug the numbers in the formula then solve for the variable

    isn't the formula for #1 like v2 = v1 * 2ax or something like that.

    I haven't done physics since like 2006 so I don't remember totally
    Last edited by B-Neva; 09-10-2009 at 07:20 PM.
    Workout Log
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  4. #4
    Registered User xTASTYKAKESx's Avatar
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    These are really easy, don't you have the formulas? All you have to do is figure out which formula to use and plug in the numbers.
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  5. #5
    Registered User davo1028's Avatar
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    d=5t^2
    d=5(49)
    d=245

    the formula for distance is distance = 1/2 gravity (10) x time squared
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  6. #6
    Registered User davo1028's Avatar
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    formula for speed is speed = 10 (acceleration due to gravity) x time (in seconds)
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  7. #7
    Registered User Fakethatrolex's Avatar
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    Originally Posted by toledos View Post
    001 (part 1 of 2) 10.0 points
    A ball is thrown straight up with an initial
    speed of 70 m/s.
    How high does it go? Assume the accelera-
    tion of gravity is 10 m/s2 . Answer in units of
    m.

    Vi = 70m/s, Vf = 0m/s, a = 10m/ssquared
    Vfsquared = Visquared + 2ad
    0squared = 70squared + 2(10)(d)
    0 = 4900 + 20d
    4900 = 20d
    d = 245m


    002 (part 2 of 2) 10.0 points
    How long is it in the air? Answer in units of
    s.


    003 (part 1 of 3) 10.0 points
    What is the magnitude of the instantaneous
    velocity (speed) of a freely falling object 34 s
    after it is released from a position of rest?
    Consider the acceleration of gravity to be
    10 m/s2 . Answer in units of m/s.


    004 (part 2 of 3) 10.0 points
    What is its average speed during this 34 s
    interval? Answer in units of m/s.


    005 (part 3 of 3) 10.0 points
    How far will it fall during this time? Answer
    in units of m.


    006 10.0 points
    During a baseball game, a batter hits a high
    pop-up.
    The acceleration of gravity is 9.8 m/s2 .
    If the ball remains in the air for 5.24 s, how
    high does it rise? Answer in units of m.


    007 10.0 points
    A stone is dropped from rest at the top of a
    mine shaft. It takes 55 s for a stone to fall to
    the bottom of a mine shaft.
    The acceleration of gravity is 9.8 m/s2 .
    How deep is the shaft? Answer in units of
    m.


    008 10.0 points
    An object is dropped from rest.
    The acceleration of gravity is 9.8 m/s2 .
    What is its instantaneous speed when it has
    been in motion for 6 s? Answer in units of
    m/s.


    009 10.0 points
    An object is dropped from rest.
    The acceleration of gravity is 9.8 m/s2 .
    What is the acceleration after 6 s? Answer
    in units of m/s2.


    010 10.0 points
    An object is falling freely.
    The acceleration of gravity is 9.8 m/s2 .
    How much gain in speed each second does
    it acquire? Answer in units of m/s.
    Sorry for typing out the "squared"
    Reply With Quote

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