Answer:
Explanation:
1. GPE only as the ball is not moving.
GPE = mass * gravity * height
= 2kg * 9.8m/s^2 * 40m
= 784J
2. Both KE and GPE as the ball is moving.
GPE is the same as 1 at 2*9.8*40 = 784J
KE = 1/2 * mass * velocity^2
= 1/2 * 2kg * (5m/s)^2
= 25J
3. KE only as the bottom is on the ground.
KE = 1/2 * 2kg * (10m/s)^2
= 100J
