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March 27, 2015

Homework Help: physics

Posted by apoorva on Tuesday, March 11, 2008 at 2:22am.

a portable electric drill produces 1.2 hp at full load. If 85% of the power provided by the 9.6 V battery pack is useful, what is the current flow? how much power goes into the waste heat?

I don't know what to do. In class, we learned about amps, volts,and resistance, but never horsepower.

the equations we used were like P=v^2/R or V=iR and stuff like that.

please help

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