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Assertion: If a body is momentarily at r...

Assertion: If a body is momentarily at rest, it means that force or acceleration are necessarily zero at that instant.
Reason: Force on a body at a given time is determined by the direction of motin only.

A

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

B

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

C

If assertion is ture but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
If a body is momentarily at rest i.e., `v=0` at an instant, it does not mean that force or acceleration are necesserily zero at that instant. For example, when a ball thrown upward reaches its maximum height, `v=0 ` but the force continue to be its weight `mg` and the acceleration is `g` . Force is not always inn the direction of motion.
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