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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A simple pendulum oscillates in a vertical plane. When it passes through the mean position, the tension in the string is 3 times the weight of the pendulum bob. What is the maximum displacement of the pendulum with respect to the vertical?

Answer: (D)

Solution

At the mean position, T-mg=mv^2/l=3mg-mg=2mg\Rightarrow v^2=2gl. From energy

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Question ID VK-158217