Please explain the answers:
1. A basketball player makes a free-throw shot at the basket. The 0.6 kg basketball leaves the player's hand at a speed of 7.2 m/s from a height of 2.21 m above the floor. Determine the speed of the ball as it goes through the hoop, 3.05 m above the floor.
2. A string hangs over a frictionless pulley. A 1.0 kg mass hangs on one side of the pulley and a 2.5 kg mass hangs on the other side. Both masses are initially at rest. Calculate the speed of each mass when the larger mass has fallen 1.0 m from the rest position.