An Atwood's machine is using a 1.5 m radius flywheel (a solid disk) with a mass of 20 kg. A 65 kg mass is attached to one end of the string and a 50 kg mass is attached to the other end.

a) What is the tension in the string?
b) What is the angular acceleration of the flywheel?
c) What is the acceleration of the system?
d) What is the velocity of the masses after 3 s?