1. The problem statement, all variables and given/known data As part a of the drawing shows, two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of m1 = 312 N, and the other has a weight of m2 = 758 N. The rope and the pulleys are massless and there is no friction. (a) What is the acceleration of the lighter block? m/s2 (b) Suppose that the heavier block is removed, and a downward force of 758 N is provided by someone pulling on the rope, as part b of the drawing shows. Find the acceleration of the remaining block. m/s2 (c) Explain why the answers in (a) and (b) are different. 2. Relevant equations Fnet = ma 3. The attempt at a solution 758 - 312 = 446, the net force of the entire system. Then I plugged this into Fnet = ma, 446 = ma. To get the mass, I did 758 + 312 1070, and then divided by the acceleration due to gravity, 9.8, and got 109.184. I plugged in and got 446 = 109.184(a), solved for a and got 4.085 as the accelearation in part a. What I don't understand is how the acceleration in part b is different, since the same force is being applied? Or is it because I don't add the weight of the human to my mass measurement when finding out that acceleration? Why not?