4. (5 Points) A system is composed of a massless, frictionless pulley of radius a, with an doesnt -s inextensible, massless string of length L over the top of it that is attached to some point spread mass m, hanging on the left and some point mass m2 hanging on the right. Expressing this system with a single degree of freedom, determine the acceleration of the system. one direction of moving ounce L Some distance distance are related to one another have