Question

work energy and power​

Answer 1

Answer:

0

Explanation:

The work done by gravity is 0 because

1) gravity is a conservative force

2) as you can see in the question, the body returns back to its original position, which shows that the displacement of the body is 0, thereby, work done is also zero.

3) The work done by gravity is zero ONLY when the displacement and force vectors are perpendicular to each other.

Hope it helps:)

Answer 2

Answer:

0...............................