Question

please answer this question​

Answer 1

Answer:OPTION - A IS YOUR ANSWER(MAY BE)

Answer 2

Answer:

7b) mg(h2-h1)

Explanation:

Let a body of mass m at height h2 have potential energy mgh2. The acceleration due to gravity is g

as it falls, height decreases, let the present height be h1 and the potential energy at the point is mgh1.

change in potential energy is mgh2-mgh1 since potential energy depends upon height and h2>h1 and hence mgh2>mgh1 since m and g are constant for body.

from this,

mg(h2-h1) is the answer.