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1. A boy takes a running jump off the high-dive board at the local pool. His...

1. A boy takes a running jump off the high-dive board at the local pool. His speed as he leaves the board is 3.0 m/s and the board is 5.0 m above the water. What is his speed just before he hits the water? please include an energy chart

2. A roller-coaster car rolls over the crest of 18 m high hill at a speed of 3.2 m/s. The car then rolls down the track to the bottom of the hill and continues up the next hill, which is 10 m high. (Neglect frictional effects). How fast is the car moving at the bottom of the 18 m-hill? How fast is the car moving at the top of the 10-m hill? please show an energy chart for both hills

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