Jeff, a snowboarder who weighs 1000 N, is practicing on a trampoline for an upcoming competition. As Jeff bounces straight up off the trampoline, his speed is 6.26 m/sec. When he reaches the top of his bounce, his potential energy is approximately:

Potential energy

Explanation:

Given data

Weight of the person = 1000 N

Mass of the person =

Speed = 6.26

Kinetic energy is given by

Put the values in above formula we get

When the person reach top point then at this point the velocity is zero & kinetic energy at top point is equals to the potential energy.

Therefore potential energy

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.