Which expression correctly gives the rotational kinetic energy of a disk with moment of inertia I and angular velocity ω?

Which expression correctly gives the rotational kinetic energy of a disk with moment of inertia I and angular velocity ω?

• A. E = I ω
• B. E = I ω^2
• C. E = 1/2 I ω^2
• D. E = 2 I ω^2

Answer: (C)