At amusement parks, there is a popular ride where the floor of arotating cylindrical room falls away, leaving the backs of theriders \"plastered\" against the wall. Suppose the radius of the roomis 4.24 m and the speed of the wall is 16.2 m/s when the floorfalls away. The source of the centripetal force on the riders isthe normal force provided by the wall. (a) How much centripetalforce acts on a 53.0 kg rider? (b) What is the minimum coefficientof static friction that must exist between the rider's back and thewall, if the rider is to remain in place when the floor dropsaway?
