1. A golfer tees up their ball on top of a 25m tall cliff. The golf ball weighs 45.5 grams. The golfer swings their 200g club at a speed of 42m/s. Assume there is no air resistance, and that all energy transfers with no losses between objects.
   1. What is the initial kinetic energy given to the ball from the club? Assume the club stops moving once it hits the ball.
   2. What is the speed of the ball just before it hits the ground?
   3. The ball bounces back up a height of 2.1m. How much energy was lost to the Earth?