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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

The string of a pendulum of length is displaced through from the vertical and released. The minimum strength of the string, in order to withstand the tension as the pendulum passes through the mean position, is

Answer: (C)

Solution

at the mean position (energy conservation from the horizontal release point). T = mg + \dfrac{mv^2}{l} = mg + 2mg = 3mg.

Question ID VK-157742