1. The problem statement, all variables and given/known data A man pushes an 80 N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30° with the horizontal. The force he exerts is parallel to the slope. If the speed of the crate is constant, then the work done by the man is: a) 61 J b) 200 J c) 140 J d) -200 J 2. Relevant equations F=ma 3. The attempt at a solution I used sin 30 = y/50, so y (the height of the slope) equals 2.5. I don't know what to do from here.