A system contains two pulleys, over the first pulley there is mass 3, m_3, on one end of the rope. the other end of that rope is connected to the second pully. Hung on the second pulley are mass 2, m_2, and mass 1, m_1. Find the acceleration constraint in terms of a_1 and the tension in the string of the second pulley.
The Attempt at a Solution
the change in the string over pulley 1 causes a_3=.5*a_2 and a_2=a_1 (not sure?)