A Disk with a Rotational Inertia of 5

Multiple Choice

A disk with a rotational inertia of 5.0 kg∙m² and a radius of 0.25 m rotates on a fixed axis perpendicular to the disk and through its center.A force of 2.0 N is applied tangentially to the rim.As the disk turns through half a revolution the work done by the force is:

A) 1.6 J
B) 2.5 J
C) 6.3 J
D) 10 J
E) 40 J