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BlackJ
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Homework Statement
A constant force (Fa) of magnitude 82.0 N is applied to a 3.00 kg shoe box at an angle of 53.0 degrees, causing the box to move up a frictionless ramp at a constant speed. How much work is done on the box by Fa when the box has moved through a vertical distance h = 0.150 m.
Homework Equations
The Attempt at a Solution
My professor gave a hint that v is constant => a=0, thus, the Wnet= Wg + Wn + Wa =0 (Wn=0)
I feel confused here. If so, work done by Fa will be equal to negative potential energy Wg, which is -mgh and the answer will be in negative?
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