A 600 g ball moves in a vertical circle on a 1.09 m-long string. If the speed at the top is 3.90 m/s, then the speed at the bottom will be 7.61 m/s.
What is the magnitude of gravitational force acting on the ball? What is the tension in the string when the ball is at the top? What is the tension in the string when the ball is at the bottom?