#### Question

Underline the correct alternative:

The rate of change of total momentum of a many-particle system is proportional to the external force/sum of the internal forces on the system.

#### Solution 1

External force

Internal forces, irrespective of their direction, cannot produce any change in the total momentum of a body. Hence, the total momentum of a many- particle system is proportional to the external forces acting on the system.

#### Solution 2

Internal forces can not change the total or net momentum of a system. Hence the rate of change of total momentum of many particle system is proportional to the external force on the system.

Is there an error in this question or solution?

Solution Underline the Correct Alternative: the Rate of Change of Total Momentum of a Many-particle System is Proportional to the External Force/Sum of the Internal Forces on the System. Concept: Concept of Collisions.