1. The problem statement, all variables and given/known data Find the work done by friction force as it slides down an inclined plane in terms of... m (Mass) x (Displacement) μ (Friction Coefficient) θ (Angle of the inclined plane) 2. Relevant equations ƩFnormal = mgcos(θ) ƩFhorizontal = mgsin(θ) ƩFfriction = μFnormal - But then I realised these three equations all linked together which used gravity... which isn't suppose to be used) F = ma w = max 3. The attempt at a solution What I came up with was: Work = mgx(μcos(θ) + sin(θ)) Which doesn't seem right and uses gravity... Help Please! Thanks.