Question

If a track star runs down the runway in the high jump event faster, he will be able to jump to a greater height. This is explained by the conservation of energy. Which statement best explains this idea?
Responses
A A faster runner creates more energy during their jump.A faster runner creates more energy during their jump.
B A faster runner can apply a greater force than a slower runner.A faster runner can apply a greater force than a slower runner.
C The upward push on the jumper is equal to his downward push on the ground.The upward push on the jumper is equal to his downward push on the ground.
D The kinetic energy before the jump is converted to potential during the jump.The kinetic energy before the jump is converted to potential during the jump.

Answer 1

D. The kinetic energy before the jump is converted to potential energy during the jump.

Briefly: a faster run gives the jumper more kinetic energy (1/2 m v^2), and during takeoff much of that energy can be converted to gravitational potential energy mgh, so h ≈ v^2/(2g) (neglecting losses).