APFIVE Conserved Angular Momentum and Kinetic Energy
A wheel of mass M and radius R rolls without slipping with translational speed v. If the wheel’s radius suddenly decreases to R/2 while maintaining the same angular momentum about its center of mass, what happens to the total kinetic energy?
A
It increases by a factor of 4
B
It remains the same
C
It increases by a factor of 4
D
It increases by a factor of 2
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