1. The problem statement, all variables and given/known data The pulley system is stationary. What is the maximum and minimum mass of block B to keep the system stationary? We know that: Mass of A = 100 kg Angle = 45 degrees μ = 0.1 2. Relevant equations F = ma 3. The attempt at a solution I know that in order for the system to stay stationary the forces in both directions must be equal. I also know that the maximum mass of B is when the system almost slides to the left, and minimum is when it almost slides to the right. I'm not sure how to use the equation for minimum or maximum. I thought the equation for moving to the left direction would be: (mass of B)(gravity) - T = T - sin(45)(mass of A)(gravity) - Force of friction But then how would we find T? And is this the right equation for the maximum?