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April 19, 2015

Homework Help: Physics

Posted by Phil on Saturday, January 9, 2010 at 8:27pm.

A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his weight in the tire is:

(a) (1/2)W
(b) W
(c) 2W
(d) (2/3)W
(e) (3/2)W

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