a 120kg horizontal flywheel with a 0.5m radius rotates friction-free about an axis through its center. A rope is wrapped around the outside of the flywheel and a steady pull of 60.0N is exrted on the rope. The flywheel starts from rest and is unwound in 4 seconds. The moment of inertia of a disk is 1/2MR^2.
A) what is the torque applied to the wheel?
B) what is the angular acceleration of the flywheel?
C) How many rotations does the flywheel make?
D) What is the length of rope needed?