Recently stumbled on this problem: A uniform disk (I =½ MR2 ) of mass 8.0 kg can rotate without friction on a fixed axis. A string is wrapped around its circumference and is attached to a 6.0 kg mass. The string does not slip. What is the tension in the cord while the mass is falling? The answer is 24 Newtons, but i would like to know why. If anyone can provide a solution/explanation, that would be greatly appreciated. I am having trouble figuring out the effect the disk's inertia has on the system's acceleration.