Calvin places his stuffed tiger Hobbes at the edge of a playground merry-go-round 0.92 m from the center and starts to turn it by holding onto one of its supports and running around the perimeter. He gets it turning one rotation every three seconds. Find the force of friction acting on Hobbes, who has a mass of 1.42 kg. The coefficients of friction between the steel of the merry go-round and the cotton fabric of Hobbes’ butt are μk = 0.45 and μs = 0.5.

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