Question

the rotor ride consists of a hallow cylindrical room approximately 2.5 m in radius.after the room rotates to a certain speed ,the floor drops away. A rider is left stationary because they are supported by t he static friction. Assume the rider has a mass of 75 kg and the coefficient of friction is 0.35. calculate the speed required to prevent the rider from slipping down the wall and the frequency of rotation corresponding to this speed