Three identical solid, uniform discs—A, B, and C—each have the same radius but different masses and angular speeds as listed:
• Disc A: mass 2m, angular speed ω
• Disc B: mass m, angular speed 2ω
• Disc C: mass 3m, angular speed 0.5ω
Rank the discs’ rotational kinetic energies from greatest to least.
a) C > A > B
b) B > A > C
c) A > B > C
d) A > C > B