Assertion :In $S H M$ , acceleration is always directed towards the mean position. Reason: In $S H M$ , the body has to stop momentary at the extreme position and move back to mean position.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
$S H M$ is basically to and fro motion about the mean position. So when the body goes away from mean position an acceleration always try to return the body towards mean position. As the acceleration in $S H M$ is always in opposite phase to that of displacement. The displacement of the particle in $S H M$ at an instant is directed away from the mean position then acceleration at that instant is directed towards the mean position.

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