MHT CET 2025 Physics question
A simple pendulum is suspended from ceiling of a lift when lift is at rest its period is 'T'. with what acceleration 'a' should lift be accelerated upward in order to reduce the period to ? (take 'g' as acceleration due to gravity)
Answer: (B)
Solution
Period of a simple pendulum is . In a lift accelerating upward with , the effective gravity is , so . For :
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