Question

Conservation of linear momentum for a system is applicable only when the external forces acting on a system are zero.

• A. True
• B. False

Answer 1

The correct option is A True

1. Momentum $P=mv$ where $m$ is the mass of a body and $v$ is its velocity.
2. Law of conservation of momentum states that the total momentum of a system remains conserved only in absence of any external forces on the system.
3. So, the law of conservation of momentum can be applied only when the external forces acting on the system are zero.

Hence, the given statement is True.