A football of mass 50gm falls from a height 5m and rebounds from the floor to a height of 3m ,find(A) kinetic energy at the momentum of striking the ground .(B)The kinetic energy at the moment of leaving the ground​

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Which of the following are appropriate acceleration units?

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.