APFIVE Rotational and Translational Kinetic Energy
Two identical disks with moment of inertia I are initially at rest. Disk A is given an angular impulse causing it to rotate with angular velocity ω. Disk B is given a linear impulse causing its center of mass to move with velocity v = Rω, where R is the disk radius. How does the kinetic energy of disk A compare to disk B?
A
Disk A has the same kinetic energy as disk B
B
Disk A has one-fourth the kinetic energy of disk B
C
Disk A has half the kinetic energy of disk B
D
Disk A has twice the kinetic energy of disk B
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