772 2 A cart of mass m, = 0.50 ke on a frictionless surface is connected by a string to a hang- ing object of mass my = 0.10 kg. In Experiment A, the system is released from rest. In Experiment B, a student gives the cart an initial push to the right to set it in motion. (a) In which experiment, if either, is the magnitude of the cart's acceleration greater? Explain briefly. (b) Is the direction of the cart's acceleration the same or different in each experiment? Explain briefly