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 612.0 lbs while Magnus pulls the bus a distance of 35.0 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

if u consider magnus alone as system , them the only esternal force is the string as the string is massless therefore force remain's constant through out the string Given the force was 610lb,.. it moved to a distance of 38 inch.. work = = 610 *38*3.166*lb-feet=0.073Megalb-feet =610 *38*3.166*4.466*11.3 NM=3.71MegaNM

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