Suppose a car travels 108 km at a speed of 30.0 m/s,
and uses 2.0 gal 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 about 140 MJ/gal.) (a) What is the magnitude of
the force exerted to keep the car moving at constant speed?
Answers: 1
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Suppose a car travels 108 km at a speed of 30.0 m/s,
and uses 2.0 gal of gasoline. Only 30% of the...
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