I am stuck on this damn problem and cannot go on with my homework until I get it. The background info is this is some gay spinning ride that a person leans against the wall and once it gets up to speed the floor drops away and the person stays there stuch against the wall. What is the minimum coefficent of static friction of the ride if the person is not to slide downward if the radius of the cylinder is 3.5 meters and a constant rotation rate of 0.50 rev/sec? Give your answer with two decimal places. The correct answer is meu (coefficent of friction) is 0.28 but for the life of me I cannot get this damn thing right. I have figured that the radial acceleration is 34.54 m/s^2 and the velocity is 11.00 m/s but that is all I can figure out.