A 0.50 kg ball that is tied to the end of a 1.2 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical.
(a) Determine the ball's speed.
___________ m/s
(b) If, instead, the ball is revolved so that its speed is 4.0 m/s, what angle does the cord make with the vertical?
___________ °
(c) If the cord can withstand a maximum tension of 9.1 N, what is the highest speed at which the ball can move?
_____________ m/s