Answered: 47. A 1500 kg car accelerates from rest…

47. A 1500 kg car accelerates from rest to 75 km/h in 45s. How much power is supplied by the engine to accelerate the car? C. 6.4 W D. 7.2 kW A. 7.2 W B. 6.4 kW

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 37PE: A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a...

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Concept explainers

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

Question

47. A 1500 kg car accelerates from rest to 75 km/h in
45s. How much power is supplied by the engine
to accelerate the car?
A. 7.2 W
C. 6.4 W
B. 6.4 kW
D. 7.2 kW

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