Answered: A 2000 Kg car is moving at 54 km/hr…

A 2000 Kg car is moving at 54 km/hr behind a truck. In order to pass the track, the car changes its speed to 72km/hr in 5 sec. What engine power is developed during this time ? A. 15KW

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 47PE: (a) What is the efficiency of an out-of-condition professor who does 2.10105J of useful work while...

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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

A 2000 Kg car is moving at 54 km/hr behind a truck. In order to pass the track, the car changes its speed to 72km/hr in 5 sec. What engine power is
developed during this time ?
A. 15KW

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