Newton's Second Law: the Atwood Machine
Consider an Atwood machine, where two blocks are connected by a light inextensible cord and hang from a frictionless pulley. If the mass of one of the block hanging on the left is m1 = 40.8 kg and the tension of the rope is 423.3 N, what is the acceleration of the block hanging on the left, as measured with respect to a vertical axis y pointing upward (please include the correct sign)?