Question: You have a ball on a wire that is twirled in a circular orbit with a radius of 4.2 m, and the centripetal force acting on the ball, that has a mass of 33 kg, is 328 N. What is the speed of the ball in orbit? Hint: this is a problem in which you must solve the force equation for the velocity. See the figure of a ball on a wire in the Rotation and Angular Momentum Section of the text to visualize the problem