problem06_98

University Physics with Modern Physics with Mastering Physics (11th Edition)

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6.98: a) N. 10 68 . 1 km/h)) m/s)/(3.6 km/h)((1 0 . 60 ( W 10 0 . 28 3 3 × = × = = v P F b) The speed is lowered by a factor of one-half, and the resisting force is lowered by a factor of ), 4 / 35 . 0 65 . 0 ( + and so the power at the lower speed is
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Unformatted text preview: hp. 13.8 kW 10.3 0.35/4) 0.65 kW)(0.50)( . 28 ( = = + c) Similarly, at the higher speed, hp. 154 kW 114.8 4) 0.35 .65 kW)(2.0)(0 . 28 ( = = +...
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