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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

A ball suspended by a thread swings in a vertical plane, so that its acceleration in the extreme position and lowest position are equal. The angle of thread deflection in the extreme position will be

Answer: (D)

Solution

At the extreme position v = 0 so a = g sin(θ); at the lowest position a = v²/l = 2g(1 - cos θ). Equating: sin(θ) = 2(1 - cos θ),

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Question ID VK-040744