Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 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? (Enter a number.)686.1N(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? (Enter a number.)?gallons Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keepsthe car moving at constant speed despite friction. (The energy content of gasoline is 1.30 x 108 J per gallon.)(a) What is the force (in N) exerted to keep the car moving at constant speed? (Enter a number.)686.1✔ N(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? (Enter a number.)X gallons

Name: Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 gal
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Description: Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 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

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

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter8: Potential Energy And Conservation Of Energy

Section: Chapter Questions

Problem 39P: A sled of mass 70 kg starts from rest and slides down a 10 incline 80 m long. It then travels for 20...

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(a)

What is the force (in N) exerted to keep the car moving at constant speed? (Enter a number.)
686.1N

(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? (Enter a number.)
?gallons

Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 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 x 108 J per gallon.)
(a) What is the force (in N) exerted to keep the car moving at constant speed? (Enter a number.)
686.1
✔ N
(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? (Enter a number.)
X gallons

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