1. The problem statement, all variables and given/known data Derive the equation for the normal force (N) and the static frictional force (F) in terms of the weight (Mg). [tex]\beta[/tex] is the angle of inclination. 2. Relevant equations http://img62.imageshack.us/img62/5559/normalforcediagram.png [Broken] 3. The attempt at a solution - For N I used N = -mg Sin [tex]\beta[/tex]. I'm also thinking though, that since friction is present my equation for N should be: N = -mg Sin [tex]\beta[/tex] - F For Static Frictional force I get: F = mus N I feel confident about the equation for static friction. I'm not sure if I should be using (-mg) or (mg) for the normal force though.