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April 26, 2015

Homework Help: Physics

Posted by HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on Thursday, March 12, 2009 at 6:01pm.

A 1.0 e 3 kg elevator carries a maximum load of 800.0 kg. A constant frictional force of 4.0 e 3 N retards the elevator's motion upward. Waht minum power in kilowatts, must the motor deliver to lift the fully loaded elevator at a constant force of 3.00 m/s?

I have no idea how to do this

I believe I'm suppose to use the formula for power

P= W/delta t = Fd/delta t = mgd/delta t

and

P = Fv

I don't know how to do this problem using any of these formulas

please tell me which formula to use and how to do this thanks

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