pose a car travels speed of 30.0 m/s, and uses 2.20 gallons of gasoline. Only 309% G the gasoiine goes into userul vwork by that keeps car moving at const speed energy content of gasoline 1.30 x 108 ) per gallon.) (a) What.is.the.forçe (in N) exerted to keep the car moving at constant speed? (Enter a number.) x N Enter a number. (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

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Suppose a car travels 108 km at a speed of 30.0 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 X 108
J per gallon.)
(a) What.is.the.forçe (in N) exerted to keep the car moving at constant speed? (Enter a number.)
Ex N
Enter a number.
(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
Transcribed Image Text:Suppose a car travels 108 km at a speed of 30.0 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 X 108 J per gallon.) (a) What.is.the.forçe (in N) exerted to keep the car moving at constant speed? (Enter a number.) Ex N Enter a number. (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
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