A1400 kg wrecking ball hangs from a 20-m-long cable. the ball is pulled back until the cable makes an angle of 23.0 ∘ with the vertical. part a by how much has the gravitational potential energy of the ball changed?

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.

If element x has 99 protons how many electrons does it have

What is the momentum of 70 kg runner traveling at 10 m/s?