Problem 11.65 As an ice skater begins a spin, his angular speed is 3.07rad/s . A
ID: 1313745 • Letter: P
Question
Problem 11.65
As an ice skater begins a spin, his angular speed is 3.07rad/s . After pulling in his arms, his angular speed increases to 5.76rad/s .
Part A
Find the ratio of the skater's final moment of inertia to his initial moment of inertia.
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Problem 11.65
As an ice skater begins a spin, his angular speed is 3.07rad/s . After pulling in his arms, his angular speed increases to 5.76rad/s .
Part A
Find the ratio of the skater's final moment of inertia to his initial moment of inertia.
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Explanation / Answer
The angular momentum remains constant
therefore.
I1w1 = I2w2
I2/I1 = w1/w2
= 3.07/5.76
= 0.533