Q1. A ball tied to the end of the string is swung in a vertical arc of radius r under the action of gravity. What would be the tension in the string at the highest point and when the ball is at the lowest point?
Q2. A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.