A small bob attached to a light inextensible thread of length l has period T as a simple pendulum. The thread is now suspended from a fixed end O of a vertical rigid rod of length 3l/4 as shown. The periodic time becomes:
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A small bob attached to a light inextensible thread of length l has period T as a simple pendulum. The thread is now suspended from a fixed end O of a vertical rigid rod of length 3l/4 as shown. The periodic time becomes:
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