4. A ball with a mass of 2 kg is attached to a string and is rotated in a vertical circle with a radius of 0.5 meters and a constant speed of 4 m/s. Find the force of tension in the string when the ball is (a) at the top and (b) at the bottom of the circular rotation. Draw free-body diagrams of the ball in each case and use Newton's Second Law to calculate this. (a) Ball at the top: m (b) Ball at the bottom: m

4. A ball with a mass of 2 kg is attached to a string and is rotated in a vertical circle with a radius of 0.5 meters and a constant speed of 4 m/s. Find the force of tension in the string when the ball is (a) at the top and (b) at the bottom of the circular rotation. Draw free-body diagrams of the ball in each case and use Newton's Second Law to calculate this. (a) Ball at the top: m (b) Ball at the bottom: m