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A solid sphere of radius r and mass m is released from a rest on a...

A solid sphere of radius r and mass m is released from a rest on a track. At a height h above a horizontal surface. The sphere rolls without slipping with its motion continuing around a loop of radius R<<r

A) If R=0.3h, what is the speed of the sphere when it reaches the top of the loop? Your response must be expressed in terms of some or all of the quantities given above and physical and numerical constants

B) What is the normal force acting on the sphere when it is at the top of the loop? Your response must be expressed in terms of some or all of the quantities given above and physical and numerical constants

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