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April 25, 2014

Homework Help: physics

Posted by monic on Friday, October 12, 2012 at 12:09am.

A skier of mass 74 kg is pulled up a slope by a motor-driven cable.
(a) How much work is required to pull him 90 m up a 30 slope (assumed frictionless) at a constant speed of 3.0 m/s?
J

(b) What power (expressed in hp) must a motor have to perform this task?
hp

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