Physics
Grade-9
Easy
Question
Assertion: The amplitude of an oscillating pendulum decreases gradually with time
Reason: The frequency of the pendulum decreases with time.
- Assertion is correct, the reason is incorrect
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion
Hint:
The correct answer is: Assertion is incorrect, the reason is correct
Correct option is A)
The amplitude of an oscillating pendulum decreases with time due to friction of air. Its frequency doesn't depend upon the amplitude 
The amplitude of an oscillating pendulum decreases with time due to friction of air. Its frequency doesn't depend upon the amplitude
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