Explanation Given Info : The time taken for the old car to accelerate from zero to v is 10 s , The time taken for the new sports car to accelerate from zero to 2 v is 10 s . Expression used for power. P = W t P is the power of the car W is the work done by the car t is the time taken by the car Since, the energy coming from the engines appears only as kinetic energy of the cars. The work done is kinetic energy. W = 1 2 m v 2 W is the work done m is the mass v is the speed Replace W by 1 2 m v 2 in the expression for power

10th Edition

ISBN: 9781285737027

Author: Raymond A. Serway, Chris Vuille

Publisher: Cengage Learning

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Chapter 5, Problem 55P

To determine

The comparison of the power of the two cars.

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