Homework Help - Calculus III / Physics / Work-Force Problem #2 I'm in a similar scenario as with my other question. I have tried to answer the problem correctly, and I have found similar (and even an identical) problem in my textbook, yet I still can't seem to yield the correct answer with this specific problem.
The example problem in my textbook:
A crate is hauled 8m up a ramp under a constant force of 200 N applied at an angle of 25 degrees to the ramp. Find the work done. W = F * D cos(25) = (200)(8)cos(25) = 1450J.
Can anyone give me any advice on how to solve it?
A woman exerts a horizontal force of 4 pounds on a box as she pushes it up a ramp that is 5 feet long and inclined at an angle of 30 degrees above the horizontal.
Find the work done on the box.
I would think that the work would simply be (4)(5)cos(30), but that is not the correct answer.
(I've figured out how to accept answers now, so I'll accept the most helpful answer.)

As Fabian said in a comment, the $\cos$ should be $\sin$
