Question

1)Which conditions will result in the smallest change in momentum?
A)a large force over a long time period
B)a large force over a short time period
c)a small force over a long time period
D)a small force over a short time period
2)When comparing the momentum of two moving objects, which of the following is correct?
A)The object with the higher velocity will have less momentum if the masses are equal.
B)The more massive object will have less momentum if its velocity is greater.
C)The less massive object will have less momentum if the velocities are the same.
The more massive

Answer 1

object will have less momentum if the velocities are the same.

Answer 2

momentum=mass*v so for number 1, the answer is D. You want to minimize the v term, so that means you want to minimize acceleration, so that v stays small as possible. If F=ma then a will be smallest when F is smallest and for the smallest amount of time.

Answer 3

oh alright. i see now. i left my physics notebook at school, so i dont have the equations i took notes in:[

Answer 4

For number 2, if momentum=m*v, and v stays the same, then the less massive object will have a smaller momentum. So C

Answer 5

Can i ask you 1 more question?

Answer 6

A ball with a momentum of 4.0 kg•m/s hits a wall and bounces straight back without losing any speed. What is the change in the ball’s momentum?

–8.0 kg•m/s
–4.0 kg•m/s
0.0 kg•m/s
8.0 kg•m/s

Answer 7

You can.

Answer 8

The answer is -8.0kgm/s This is because if we call the balls momentum initially mv, then after it hits the wall it will be m(-v) or -mv. Then the change is final-initial. So this is -mv-(mv) which is -2mv. So the change would be -2*4

Answer 9

Are you gettin it?