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# Thread: Who likes physics? :)

1. ## 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.

2. I really just need #1...

3. 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

4. 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.

5. d=5t^2
d=5(49)
d=245

the formula for distance is distance = 1/2 gravity (10) x time squared

6. formula for speed is speed = 10 (acceleration due to gravity) x time (in seconds)

7. Originally Posted by toledos
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
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"

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