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