At amusement parks there is a popular ride where the floor, Ask an Expert

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At amusement parks, there is a popular ride where the floor of a rotating cylindrical room falls away, leaving the backs of the riders "plastered" against the wall. Suppose the radius of the room is 3.30 m and the speed of the wall is 10.0 m/s when the floor falls away.

a) What is the source of the centripetal force acting on the riders?

b) How much centripetal force acts on a 55.0 kg rider?

c) What is the minimum coefficient of static friction that must exist between a rider's back and the wall, if the rider is to remain in place when the floor drops away?

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