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, and the other is tied around Magnus's 48 in waist. If a force gauge placed halfway down the rope reads out a constant 412.0 lbf while Magnus pulls the bus a distance of 55.0 in, how much work does the tension force do on Magnus? The rope is perfectly horizontal during the pull. Express the answer in both foot‑pound force (ft·lbf) and Newton‑meters (N·m).

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.