Question

Q. If net external force acting on system (having more than one mass), is zero then
A. Net momentum of the system will not change
B. Momentum of the individual masses may change
C. Momentum of system will change
D. Both A & B​

Answer 1

Answer:

A. Net momentum of the system will not change

Answer 2

• The net external force is zero; the system is known as an isolated system, where Fnet = 0.
• The system's momentum is conserved in an isolated system.
• Fnet=Δp/Δt
• Δp= change in momentum
• So, if the external force is zero, then there will be no change in momentum. Hence, the momentum is conserved.

The answer to the question is option A. Net momentum of the system will not change