1. The problem statement, all variables and given/known data Please see attached 2. Relevant equations Ff=μFn, F=ma 3. The attempt at a solution (a) The blocks can have the same acceleration due to static friction. consider the 2 blocks on the left: Ff=fmg then consider the 2 blocks on the right: Ff is also fmg? I am rather confused at this point... how does M come into the equation? because the answer for part (a) is 2(M+m)/(M+2m)f. There is no g anywhere in the equation, though from the equation, friction is to the normal, which is mg? THank you!