1. A boulder in free fall moves downward and loses 5,000 J of GPE. How much Joules of KE does it gain? 2. A child going down a slide starts with 1000 J of GPE and but only has 800 J of KE at the bottom. In this case, it is friction between the child and the slide that removes some energy. (a) As a result of friction, there is an increase in temperature in the slide and the child's clothes. What third type of energy is involved? (b) Note that not only 800 J of the GPE was converted into KE. How many Joules of this third type of energy were produced by friction? 3. Answer the following questions about an apple as it falls downward in free fall motion. (a) Does its KE increase, decrease, or stay the same