You push a 15 kg box of books 2.0 m up a 25 degree incline into the back of a moving van. The box moves at a constant velocity if you push it with a force of 95 N. How much work is done by friction on the box as it moves the 2.0 meters a. -0.232 J b. -31.6 J c. -63.2 J d. -43.3 J e. -126.8 J f. -136 J g. -190 J n. don't be silly, it's none of these!!

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