Magnus has reached the finals of a strength competition. In the first round, he

Question

Magnus has reached the finals of a strength competition. In the first round, he has to pull a city bus as far as he can. One end of a rope is attached to the bus, while the other is tied around Magnus's 48 inch waist. If a force gauge placed halfway down the rope reads out a constant 462.0 lbs while Magnus pulls the bus a distance of 84.0 inches, how much work does the tension force do on Magnus? The rope is perfectly horizontal during the pull.


Express your answer in both foot-pounds (ft-lb) and Newton-meters (N·m).

Explanation / Answer

work = force*distance

force = 462 lbs

distance = 84 inch =84/12 ft = 7 ft

work = 462*7 =3234 lbs-ft =3234 lb-ft = 4384.7 N.m

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