1. The problem statement, all variables and given/known data Two masses and a pulley are arranged as shown. m1 has a mass of 13 kg. The coefficent of static friction between ,1 and the table in 0.25. How big will m2 need to be to get m1 to begin to slide? 2. Relevant equations Fnet=ma 3. The attempt at a solution I am having an extraordinarily difficult time trying to derive an equation for this. Fnet=ma m2g-f=m1+m2a I tried rearranging to get m2=kg+f, but for one this doesn't sound right, and for two it seems impossible to solve because there are two variables. Does the acceleration somehow cancel out in this problem, or is there something else I'm missing? Thanks so much!