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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 3.6 meters and the coefficient of friction between the rider and the wall is 0.720. what is the minimum the safe speed of the wall for the rider not to drop when the floor falls? use g=9.8m/ s^2
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