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MHT CET Physics question

PhysicsOscillationsMHT CET

Two pendulums of lengths 121 cm and 100 cm start vibrating. At some instant the two are in the mean position in the same phase. After how many vibrations of the shorter pendulum, the two will be in the same phase in the mean position?

Answer: (B)

Solution

, so the longer pendulum completes 10 vibrations while the shorter one completes 11 and they

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Question ID VK-067877