Originally Posted by JDiepstra
ok in that case, youre forgetting about friction. Those blades arent spinning freely. U ever tried turning the blades with the belt still in place?
It does go deeper with what you're saying. I'd have to dig up my notes but in a nut shell, if the object being turns has less weight mass then the object turning it, then it voids out the added inertia. Something like that.