1. The problem statement, all variables and given/known data A 4.00-kg block rests on a 30.0 degree incline. If the coefficient of static friction between the block and the incline is 0.700, with what magnitude force must a horizontal force act on the block to start it moving up the incline? 2. Relevant equations F=ma Ffriction=μs*Fnormal 3. The attempt at a solution I attached the force body diagram I did. Fy Fn - mgsin(30) = 0 Fn = mgsin(30) Fx Ffr - FA = 0 Ffr = FA μ*N = FA mgsin(30) + .7*mgcos(30)) = FA (4)(9.8)sin(30)+.7*(4)(9.8)cos(30) = FA FA = 43.36 N However, the answer is 84.1 N. I'm pretty rusty with this stuff. Thank you!!!