College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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It is common practice in driving to ease one's foot from the gas pedal when driving downhill. Which of the following statements is correct regarding the underlying physical principle that explains why this method of coasting is practical?
 

Question 7 options:

 
The kinetic energy of the car is converted to gravitational potential energy as the car moves down the hill.
 
The wheels are allowed to rotate freely while coasting so braking is more effective.
 
The wheels are allowed to rotate freely while coasting so less friction is encountered.
 
The gravitational potential energy of the car is converted into kinetic energy as the car moves down the hill.
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