AIIMS 2018 Physics Simple Harmonic Motion Assertion Reason Question
Assertion: A particle executing simple harmonic motion comes to rest at the extreme positions.
Reason: The resultant force on the particle is zero at these positions.
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 both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is true because a particle in simple harmonic motion (SHM) momentarily comes to rest at the extreme positions, where its velocity is zero. However, the reason is false; while the resultant force is indeed zero at these positions, it is not the reason the particle comes to rest—rather, it is the change in direction of the restoring force that causes the particle to stop momentarily. Option A is incorrect because the reason does not correctly explain the assertion, while option B is incorrect as it suggests the reason is a valid explanation. Option D is incorrect because both statements contain elements of truth.
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