1. The problem statement, all variables and given/known data The 125kg concrete block A is released from rest in the position shown and pulls the 200kg log up the theta=30degrees ramp. Case 1: if the coefficient of kinetic friction between the log and the ramp is Uk=0.5 (a) Find the magnitudes of velocity and acceleration of the block A as it hits the ground at B Case 2: If it is changed to a log with 400kg, consider kinetic friction between the log and ramp Uk=0.5. Determine the value of the critical slope (theta), that if theta is larger than this value, the log will slip down when the concrete block A is released. Case 3: If theta=30degrees and it is changed to a log of 400kg, determine the value of the friction coefficient (the critical friction coefficient) that would result in a zero acceleration of the block. 3. The attempt at a solution Attachments: 'pic' shows a diagram of the problem '001' shows my cable and FBD for how i have set up my equations '002' shows my working so far for the first question Attempts: Case 1: I have achieved 2 equations as shown in 002 0.5(173.205)-2T+200sin30=(200/9.8)Ac or 186.6025-2T=(200/9.8)Ac and 125-T=(125/9.8)Aa I currently have 2 equations with 3 unknowns, and dont quite know how to approach that. For Case 1, I simply have to work out those 3 variables and then find velocity of Block A using Aa and fall distance, but really need a little assistance working out those set of equations. Am currently working on other problems until I can get Case 1 done, then I will post attempts at Case 2 and 3, but if anyone can allude as to how I should approach them when I get there, that would be fantastic too. Thankyou!