A 70 kg teen is riding a popular amusement park ride in which a large cylindrical chamber of diameter 4 meters, is spun along a vertical axis. If the coefficient of friction between the teen's jacket and the wall of the chamber is 0.34, find
(a) the minimum frequency ( in Hz) to keep the teen from falling to the floor; and
(b) the period of rotation.
If the moment of inertia of the cylinder is 8000kg m2, what torque must have been applied to get it going? (torque = I ?)