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BeatTheRuckus

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The Wall of Death in an amusement park is comprised of a vertical cylinder that can spin around the vertical axis. The radius of the cylinder is 3.5 m and the coefficient of static friction between the rider and the wall is 0.32. Find the minimum number of revolutions per minute necessary so that the riders do not slip down the wall (enter rev/min).

I think I am doing it right, but I do not know