What is the work done by the tension in the cable.assume, Ask an Expert

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Q. A cable lifts a 1270-kg elevator at a constant velocity for a distance of 49.7 m. What is the work done by (a) the tension in the cable and (b) the elevator's weight?

Q. Suppose the roller coaster (h1 = 34 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 50.0 m.

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