Question

An advertisement shows a 1239 kg1239 kg car slowly pulling at constant speed a large passenger airplane to demonstrate the power of its newly designed 64.7 hp64.7 hp (horsepower) engine. During the pull, the car passes two landmarks spaced 21.0 m21.0 m apart in 15.3 s.15.3 s. The passenger plane being towed is a Boeing 707 with a total weight of 62.5 tons.62.5 tons.

Calculate the force that opposes the motion. Assume that the efficiency of the car is such that 20.9%20.9% of the engine power is available to propel the car forward.

force:

NN

How much work is performed by the car on the airplane during this time?

work:

JJ

How much work is performed by the airplane on the car during this time?

Answer 1