If $F_{e x t} = 0,$ , then the momentum of the individual parts of the system must remain constant.

True

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False

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Solution

The correct option is B False
Consider the N-particle system, if the external force of the system is zero that is $F_{e x t} = 0,$ then the vector sum of individual momenta remains constant. $\vec{P} = \vec{P_{1}} + \vec{P_{2}} + \vec{P_{3}} + \overset{}{. . . . . + \vec{P_{N}} = c o n s \tan t}$
The individual momentum of the particles can change, but this change takes place in the way that the total momentum of the system remains constant.
Hence, the given statement is False.

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If Fext=0,, then the momentum of the individual parts of the system must remain constant.

If $F_{e x t} = 0,$ , then the momentum of the individual parts of the system must remain constant.