What force causes the centripetal acceleration when the

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A coin placed 30.8 cm from the center of a rotating, horizontal turntable slips when its speed is 51.2 cm/s.

(a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable?

static friction
inertia
kinetic friction
centrifugal force

(b) What is the coefficient of static friction between coin and turntable?

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What force causes the centripetal acceleration when the : a coin placed 30.8 cm from the center of a rotating horizontal turntable slips when its speed is 51.2 cms.a what force

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