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December 21, 2014

Homework Help: science

Posted by tcp on Wednesday, May 16, 2012 at 7:02pm.

the janitor exerted 80 newtons of forse to push the meter-long hall against the forse of friction. then he lifted the box weighing 220 newtons onto the second shelf, which was 1 meter off the floor. How much work did the janitor do?

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