A physics teacher explained about the concept of conservation of angular momentum in his class. After completion of class he wants to test how far the students are able to understand the topic. So he gave them a demonstration related to topic A) What qualities of him impress you?
B) A physics teacher sits on a stool that is free to rotate nearly without friction about vertical axis. He outstretched hands each hold a large mass so that the rotational inertia is 12 kgm . By pulling his arms close to his body he is able to reduce moment of inertia to 6kgm. If he starts spinning at 0.5rad/s, what is his speed after she draws his arms in?
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Answer:
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Explanation:
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