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**1. The problem statement, all variables and given/known data**

If the height of a frictionless incline is h. Determine the work done by the force due to gravity F as the crate of the mass m slides down the incline

**2. Relevant equations**

W=Fd cos (theta )

Force due to gravity perpendicular to incline= mg cos(theta)

**3. The attempt at a solution**

The solution doesn't have any mention of cosine theta or any consideration of the angle of the incline. Please explain why this would be.

The solution simply states that

W=FD and F=-mg therefore W=mgh