Homework Help: Physics

Posted by Samuel on Tuesday, November 20, 2012 at 4:00pm.

A person pulls a crate with 120 N of force against 100 N of friction a distance of 5 meters. Find the energy the person expends pulling the crate, the amount of energy converted to heat via friction, and the increase in the kinetic energy of the crate.

Physics - Elena, Tuesday, November 20, 2012 at 4:43pm
W=Fs=120•5 = 600 J
W(fr)=100•5=500 J
ΔKE=(120-100)•5=100J

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