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A block is resting on a rotating rough table as shown.

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According to A friction is kinetic and according to B friction is static.

According to B centrifugal force is balanced by friction force.

According to A centrifugal force is balanced by friction force.

According to A centripetal acceleration is provided by friction force

answer is A, C.

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Detailed Solution

A - Ground frame - No psuedoforce. Only radially inward force acting on the block is static friction which provides the necessary centripetal force .
B - Non inertial frame - The block is in equilibrium ;centrifugal is balanced by friction.

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