A Disk with a Rotational Inertia of 5

question 6

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