**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

F:

Gravity is [itex]L\sin\left(\theta\right)mg[/itex]

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

dx:

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.

http://ift.tt/1eSV5od