The main frictional force on a good bicycle is the force of air drag (Eq. 3.20). Consider a bicyclist coasting at a constant velocity on a road that is sloped downward at 5.0° with respect to the horizontal. (a) Find her approximate terminal speed. (b) Approximately how much work is done by air drag as she travels a distance of 5.0 km? Hint: She moves at a constant speed for essentially the entire trip. (c) What is the power “output” associated with the air drag force?
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