Question

A body at rest can't have

• A. Momentum
• B. Kinetic energy
• C. Both $a$ & $b$
• D. None

Answer 1

Answer: (C)

Both $a$ & $b$

Given, A body is in rest, its mean that $v=0$

Momentum $P=mv=m\times 0=0$

Kinetic energy $K.E=\frac{1}{2}m{v}^2=\frac{1}{2}m\times 0^2=0$

Hence, Momentum and Kinetic energy of body will be zero when it is in rest.