A ballerina spins on her toe, essentially without friction. She starts the spin with her arms...
A ballerina spins on her toe, essentially without friction. She starts the spin with her arms extended outward from her body. When she brings her arms up, closer to her axis of rotation, which of the following occurs.
A: She increases her moment of inertia, thereby increasing her angular speed
B: She increases her moment of inertia, thereby decreasing her angular speed
C: She decreases her moment of inertia, thereby increasing her angular speed
D: She decreases her moment of inertia, thereby decreasing her angular speed
E: Both her moment of inertia and her angular speed remain constant
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A ballerina spins on her toe, essentially without friction. She
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A figure skater spins with her arms outstretches at a rate of 10 rev/s. When she pulls her arms closer to her body, her moment of inertial about the spin axis decreased by 10%, what is the skaters new rotational rate in rev/sec?
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