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Work and Energy
I have been trying to work on this Physics problem for hours now, and I'm not getting anywhere... a box has 500 J of work done on it by an applied force. How fast will it move after the work is done? That's not the exact question, but that's the idea. I know the general formula is W=(Fs) cos... I don't have the displacement or the force magnitude... what would be the first step to figuring out this problem?
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Can we assume that friction is neglected in this problem? If so, then the all the work on the box is converted to kinetic energy, and hence W = 1/2 mv^2. It can be a bit more complicated if the box is being pushed up a hill (since some of the work would be converted to potential energy) or if friction is present (since some of the work would be converted to heat). Does this help?
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