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A 2.52kg block is pushed 1.54m up a vertical wall with constant speed by a constant force of magnitude of F applied at 63.6 degrees with the horizontal. The coefficient of friction is .574. Find the magnitude of the work done by the force of gravity.

This is what I did:

W=mgh

W=2.52(-9.8)(1.52)=-38.032J

Apparently it's wrong and I don't understand why. I drew the diagram and the force of gravity is going down.

I already found F=38.648N and the work done by F, 53.265J for a previous problem but I don't think those results will help.

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# Homework Help: Work done by gravity

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