Solve the all parts of following question:
Question: A ball that has a mass of 8 kg is attached to a string 1 m long and is whirled in a vertical circle at a constant speed of 18 m/s.
Part A: Determine the tension in the string when the ball is at the top of the circle.
Part B: Determine the tension in the string when the ball is at the bottom of the circle.
I need help to find the tension in the string when the ball is at the bottom of the circle.