1. The problem statement, all variables and given/known data a man with mass m=66kg is standing on top of a platform with mass M=120kg. The man is pulling himself up using a pair of ropes suspended over massless pulleys. he pulls each rope with force of F=600N and is accelarating towards the ceiling at acceleration a. g=9.8 m/sec^2. find the value of a in m/sec^2. * - pulley 2. Relevant equations [tex]\sum F = ma[/tex] 3. The attempt at a solution I tried treating the man and the platform as one body but i got negative acceleration, as if the man was accelerating away from the ceiling. I would like to see how you guys solve this problem.