A 400 Kg Hollow Sphere (I = 2/3 MR²) Is Spinning

Multiple Choice

A 4.00 kg hollow sphere (I = 2/3 MR²) is spinning with an angular velocity of 10.0 rad/s. The diameter of the sphere is 20.0 cm. The rotational kinetic energy of the spinning sphere is

A) 1.75 J.
B) 1.50 J.
C) 1.33 J.
D) 0.90 J.
E) 0.75 J.