Question

9. A person weighing 500 N falls from a trampoline 10 meters above the water. Its potential energy, with respect to water, in the trampoline is ___. When touching the water, its kinetic energy is ___, and its speed is ___.

10. What requires more work, (a) lifting a 10 kg object at a height of 2 meters or (b) lifting a 5 kg object at a height of 4 meters?

11. A mango falls from a tree. The force on it when touching the ground depends on:

a. the speed of the mango at the moment of touching the ground.

b. the duration of the impact with the ground.

c. if the mango bounces or not.

d. all of the above.

Explain.

Answer 1