(Answered) A roller-coaster car with a mass ofnbsp650nbspkg starts at

Statistics

A roller-coaster car with a mass of 650 kg starts at rest from a point 32 m above the ground. At point B, it is 16 m above the ground.

1. What is the initial potential energy of the car? =______kj

2. What is the potential energy at point B?= _____kj

3. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 36000 J (36 kJ), what is the kinetic energy of the car at point B? =_____kj

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