Suppose a car travels 108 km at a speed of25.0m/s, and uses1.90gallons 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 is1.3010⁸Jper 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 of28.0 m/s?

Answer rating: 100% (QA)

Lets break down the problem step by step Given information Distance traveled d 108 km 108000 m Speed ... View the full answer