The power output of a cyclist moving at a constant speed of, Physics

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The power output of a cyclist moving at a constant speed of

The power output of a cyclist moving at a constant speed of 4.8 m/s on a level road is 140 W.

(a) What is the force exerted on the cyclist and the bicycle by the air?

________ N

(b) By bending low over the handlebars, the cyclist reduces the air resistance to 18 N. If she maintains a power output of 140 W, what will her speed be?

_________ m/s

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