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A 1480 kg car is moving along a horizontal surface with a speed of 27.4 m/s....

A 1480 kg car is moving along a horizontal surface with a speed of 27.4 m/s. What work (J) must be done by the brakes to bring this car to rest in 5.78 seconds?

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Answer #1

From the work energy theorem, the amount of work done is equal to the change in kinetic (1480 kg) (0) (1480 kg) (24.7 m/s) -4.515x10 J Negative sing indicates that the work is done against the motion of the car.

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