A pendulum of mass m and length L is connected to a spring as shown in figure. If the bob is displaced slightly from its mean position and released, it performs simple harmonic motion. The angular frequency of the oscillation of bob is

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Kh2+mgLmL2

3gL

Kh2mL2

answer is B.

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Detailed Solution

τres=−Iα For small angular displacement θmglsinθ+kyh=−Iα sinθ=θ, tanθ=yh=θ

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