A crate of mass 27 kg is pushed up a ramp by a person, as shown in the figure below. Assume the coefficient of kinetic friction between the crate and the ramp is .24. Calculate the work done by the person in pushing the crate a distance of 30 m as measured along the ramp. Assume that the crate moves with at a constant velocity.
The Attempt at a Solution
I've tried a few different ways and I know something is missing but I can't quite figure out what. Here's what I've tried.