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: A body cannot have energy without having momentum but it can have momentum without having energy.
Reason: Momentum and energy have different dimensions.

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:

A body may not have momentum but may have potential energy buy virtue of its position

(e.g., compressed or stretched spring). But if the body has no energy, then its kinetic energy is zero and therefore its momentum is also zero. Also, dimensions of momentum and dimensions of energy i.e., dimensions of momentum is not equal to dimensions of energy.

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