Answer the question using the formulas

2. A ball of mass 4.0 kg is attached to the end of a 1.2 m long string and whirled around in a circle that describes a vertical plane. (a) What is the minimum speed that the ball can be moving at and still maintain a circular path? Provide a free-body diagram. (2) (b) At this speed, what is the maximum tension in the string? Provide another free-body diagram. (3) (c) If the ball is rotated in a horizontal circle at the same speed with the end of the string held above the head, what angle does the string make with the horizontal