An 800-kg car coasts down a hill 40 m high with its engine off and the drivers

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An 800-kg car coasts down a hill 40 m high with its engine off and the driver’s foot pressing on the brake pedal. At the top of the hill the car’s speed is 6 m/s and at the bottom it is 20 m/s. How much energy was converted into heat on the way down?

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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