Assertion :The amplitude of an oscillating pendulum decreases gradually with time Reason: The frequency of the pendulum decreases with time.

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 C Assertion is correct but Reason is incorrect
Once the pendulum is set into oscillation, it oscillation decreases over a period of time and eventually comes to rest. But here, it is observed that the time period of vibrating body and frequency remains the same. Here, such types of vibrations are called the damped vibrations.

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