1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution When the barrel starts to tip, the normal at point A should be 0 Newtons, and then all weight would be on point B. I'm guessing if the barrel would tip, it wouldn't be sliding across the floor so kinetic friction is not used, instead we should use static friction. I take the moment about G: [(0.45m)(Ffriction)] + [(0.1m)(Ftension)] - [(0.25m)(90kg ⋅ 9.8 m/s2)] = 0 Friction Force = Fnormal ⋅ μs = 352.8 N Solving for tension of string = 617 N Therefore the max weight of mass C is : T = mg T/g = m 617N / 9.8 m/s2 = 63 kg Is this correct?