Question

, if the round object is not a disk but a ring I=mR^2, the acceleration will be?
1 : same
2 : smaller
3 : larger
4 : depend on the inertia of the object
5 : depend on the angle of the slope

Answer 1

If the same torque is applied to a disk ($I=mr^2/2$) and ring of same mass and radius, the acceleration will be smaller for the ring.