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Question1

A 59-kg person on skis starts from rest down a hill sloped at 36° from horizontal. The coefficient of friction between skis and snow is 0.16. After the skier had been moving for 5.0 s, the friction of the snow suddenly increased and made the net force on the skier zero. What is new coefficient of friction?

Question2

A runner of mass m = 50 kg and running at 4 m/s runs as exposed and jumps on the rim of a playground merry-go-round which has a moment of inertia of 375 kg.m2 and a radius of 2 meters. Assume the merry-go-round is initially at rest, what is its final angular velocity to three decimal places?

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