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Part A
problem : A bike rider approaches a hill at aspeed of 8.5 m/s. The combined mass of the bike and the rider is85.0Kg. choose a suitable system. find the initial kinetic energyof the system. the rider coasts up the hill. assuming there is nofriction, at what hieght will the bike come to rest?
PART B
Suppose that the bike rider in part A pedaled up the hilland never came to a stop. in what system is energy conserved? fromwhat form of energy did the bike gain mechanial energy?

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