1. The problem statement, all variables and given/known data Additional instructions: Analyze the motion of the system in an inertial frame of reference fixed to the table on which M1 slides. You can't analyze the system with Newton's Laws in the frame of M1 because M1 will accelerate, and that frame will not be inertial. When you do this analysis, you're also going to need to find constraints relating the accelerations of the various masses. Try to determine these constraints in a way similar to what I did in class with the block on the wedge. It may help to note that the since M2 and M3 are attached by a rope, their motions are related. 2. The attempt at a solution I am completely lost. I spent pretty much all day working on this problem, to no avail. I know what the final answer should be, but I am having trouble finding how to get there. Here is what the final answer should be: m2m3g/(m1m2 + m2m3 + m1m3 + m2m3 + m3m3) Thanks in advance for your help!