Question

If a light body and a heavy body have same momentum, then.

• A. They have some kinetic energy
• B. Lighter body have more kinetic energy
• C. Heavier body have more kinetic energy
• D. Cannot be said

Answer 1

Answer: (B)

Lighter body have more kinetic energy

The relation between kinetic energy $\left(K\right)$ and momentum $\left(p\right)$ is given by, $K=\frac{p^2}{2m}$ where $m=$ mass of the body

As $p$ is constant so $K\propto \frac{1}{m}$

Thus, lighter body has more kinetic energy.