Question: Two blocks of unequal mass are tied together with a massless string that does not stretch and connected via frictionless and massless pulley. Mass one, M1, rests on a frictionless table top. Mass two, M2, is released and both blocks begin to move. The blocks accelerate at the same rate since they are connected. What is the acceleration? g/2. g. zero. a value greater than g. a value between zero and g.