A swing ride at a carnival consists of chairs that are swung in a circle by 15.0-m

Question:

A "swing" ride at a carnival consists of chairs that are swung in a circle by 15.0-m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 179 kg.
(a) Determine the tension in the cable attached to the chair.
(b) Find the speed of the chair.