Suppose a car travels 108 km at a speed of 40.0 m/s, and uses 2.20 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 1.30 ✕ 108 J per gallon.)(a) What is the force (in N) exerted to keep the car moving at constant speed?(b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?

Name: Suppose a car travels 108 km at a speed of 40.0 m/s, and uses 2.20 gal
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Description: Suppose a car travels 108 km at a speed of 40.0 m/s, and uses 2.20 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 1.30

Answered: Suppose a car travels 108 km at a speed…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 8PQ: A 537-kg trailer is hitched to a truck. Find the work done by the truck on the trailer in each of...

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(a) What is the force (in N) exerted to keep the car moving at constant speed?

(b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?

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