A ball with a mass of 0.200 kg is thrown straight down at the floor. It strikes the floor at a speed of 10.0 m/s and bounces straight upward with a speed of 6.00 m/s. What impulse
is applied to the ball?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e