November 30, 2015

Homework Help: Physics

Posted by Andy on Sunday, November 3, 2013 at 7:43pm.

elbow raises a 1200 N piano a distance of 5 meters using a set of pulleys. elbow pulls in 20.0 meter of rope while exerting a force of 340 N.
a) what is the work output?
b) what is work input
c) what is the mechanical advantage of this machine?
d) what is the efficiency of this machine?

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