Work, friction and gravety

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

Calculate the work done on the slanted portion by gravity and friction

2. Relevant equations

3. The attempt at a solution

Work is Fdx

Gravity is [itex]L\sin\left(\theta\right)mg[/itex]
Friction is [itex]L\cos\left(\theta\right)mg\mu_{1}[/itex]

Friction travels along a path L, but is this also true for gravity?

Simply squaring the L’s and adding them together, or subtracting friction, registers as incorrect.

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