Alight, inextensible cord passes over a light, frictionless pulley with a radius of 8.3 cm. it has a(n) 19 kg mass on the left and a(n) 3.1 kg mass on the right, both hanging freely initially their center of masses are a vertical distance 3.4 m apart. the acceleration of gravity is 9.8 m/s2 at what rate are the two masses accelerat- ing when they pass each other?