In this question, a statement of assertion is followed by …

Physics Work, Energy, Power and Collision Assertion & Reason MCQ (Single Correct)

In this question, a statement of assertion is followed by a statement of reason . Mark the correct choice as:

Assertion: Internal forces can change the kinetic energy but not the momentum of the system.
Reason: The rate of change of total momentum of a many particle system is proportional to the sum of the internal forces of the system.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If assertion is false but reason is true.

Text Solution

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The correct answer is:

The total momentum of a many particle system can change only when some external force is

applied on the system. So rate of change of momentum is proportional to external forces acting on the system. The total momentum of whole system remain constant when no external force is acted upon it (according to law of conservation of momentum).

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