1. The problem statement, all variables and given/known data What is the maximum magnitude of a horizontal Force F that can be applied without causing the block to move up the incline? 2. Relevant equations 3. The attempt at a solution Resolving F into it's components and writing down the equations For x: [itex] Fcos(theta) + μMgcos(theta) = Mg sin(theta) [/itex] For y: [itex] Fsin(theta) + mgcos(theta) = N [/itex] Are the two equations correct? Because solving for F from this doesn't give me the correct answer. Where am I going wrong?