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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

An ideal spring with spring constant k is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring initially unstretched. Then the maximum extension in the spring is

Answer: (B)

Solution

At the lowest point (maximum extension x), the block's speed is momentarily zero, so by

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Question ID VK-153798