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A small block of mass m can move inside a fixed spherical rough surface of...

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Physics

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A small block of mass m can move inside a fixed spherical rough surface of radius R Block is given a horizontal velocity V at lower most point sufficient for block to complete one round of vertical circular motion Choose the CORRECT statement s for first round of vertical circular motion R B A Work done by friction in part AB is equal to that in part DA B Work done by friction in part ABC is greater than that in part CDA C Velocity at point B must be greater than 3gR D Velocity at D is equal to velocity at B

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