Homework Help: physics

Posted by blast on Tuesday, August 17, 2010 at 8:17pm.

A 120-V motor has mechanical power output of 3.00 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the energy delivered to the motor by electrical transmission in 2.00 h of operation. Do i divide the power by .94 or time it by .94

physics - drwls, Tuesday, August 17, 2010 at 9:09pm
Divide by 0.94. It will take about 6% more electrical power than the mechanical power delivered to the output.

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