Question

A body is thrown vertically up from the earth’s surface. What happened to its P.E during the motion?

• A. Increases
• B. Decreases
• C. Remains constant
• D. First increases then decrease

Answer 1

The correct option is A

Increases

1. A body at a certain height above the earth’s surface possesses potential energy by virtue of its relative position.
2. When a body is thrown vertically upwards, its height from the earth’s surface increases, so its potential energy also increases.
3. The potential energy of the body is maximum at maximum height.
4. $$\begin{gathered} Potentialenergy=mass\times gravitationalacceleration\times height \\ PE=mgh \end{gathered}$$

Thus, when a body is thrown vertically up from the earth’s surface, its P.E during the motion increases.

Hence, option (a) is correct.