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posted by Erica .
You push a 67 kg box across a floor where the coefficient of kinetic friction is uk = .55. The force you exert is horizontal. (a) How much power is needed to push the box at a speed of .50 m/s? (b) How much work do you do if you push the box for 35 s?
*please list the steps to work out this question.

power= force*velocity
power= .55*67*g*.5 watts
work= power*time 
That helped a lot. Thank you so much.

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