Body B weighs 440 N and body A weighs 140N. The coefficients of friction between B and the incline are Us = 0.56 and Uk = 0.25. a) Find the acceleration of the system if B is initially at rest b) Find the acceleration of the system if B is moving up the incline c) Find the acceleration of the system if B is moving down the incline. (diagram: mass B is on the incline, and a is hanging) For a, my teacher showed us the following solution: a) mass b (g)(sin theta) ?> mass a (g) a = ((mass b)(g sin theta) - (mass a)(g) - Ffriction) / (mass B + mass A) = 0 Could someone explain this solution to me? I think I will be able to figure out parts b and c once i understand part a. Thanks in advance and sorry I couldn't scan the diagram.