1. The problem statement, all variables and given/known data On a certain incline plane, a body weighs 50N and requires a force of 35N to pull it up the incline. If the coefficient of friction is 0.25, find the angle of incline. (in degrees) I've been stuck on this for two days now. 2. Relevant equations F=W sin a + u W cos a 3. The attempt at a solution 35N= 50N*sin a + 0.25*50N*cos a I'm not sure how to isolate for "a".