1. The problem statement, all variables and given/known data If the magnitude of the acceleration of block m1 is a, what is the magnitude of the acceleration of block m2? 2. Relevant equations None. 3. The attempt at a solution The answer is 2a. Is it because the top string of the right pulley is adding string, while simultaneously, the lower string is subtracting string while the right pulley goes left pulling mass2? The motion is constrained by the pulley. The result would cause the mass2 to go twice the distance than mass 1. Since distance is related to acceleration, acceleration is twice as well.