A sled and rider with a combined mass of 55 kilogram are at the top of a hill a height of 35 meter above the level ground below. The sled is given a push providing an initial kinetic energy at the top of the hill of 1800 Joule.
(a) Choosing a reference level at the bottom of the hill, find what is the potential energy of the sled and rider at the top of the hill?
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(b) After the push, find the total mechanical energy of the sled and rider at the top of the hill?
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(c) If friction can be ignored, determine what will be the kinetic energy of the sled and rider be at the bottom of the hill?
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