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Ok so the first thing I did was calculate the angle by doing tangent^-1 (1.5/5.0) and got 17 degrees. Then I multiplied cos(17) and and 5.0 and divided it by 1800.

When I looked on the answer sheet it said the force was 3.6X10^2. I got 376.4. What did I do wrong?! I figured you calculate the angle since he is pushing the fridge at that degree up the ramp. Isn't the formula W=Fd(cosθ)? The answer sheet said I shouldn't have the degree, why?