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April 19, 2014

Homework Help: Physics 8B

Posted by HELP on Sunday, September 18, 2011 at 2:37pm.

A 280 electric motor is 90% efficient, meaning that 90% of the energy supplied to it ends up as mechanical work.

If the motor lifts a 210 weight at 3.5 , how much current does it draw?
Express your answer using two significant figures.
I= ? Amps

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