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(i) A person sits near the edge of a cir...

(i) A person sits near the edge of a circular platform revolving with a uniform angualr speed. What will be the change in the motion of the platform ?
(ii) What if the person stars moving from the edge towards the centre of the platform ?

Text Solution

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(i) As `L = I omega =` constant, and `I` increases, therefore, `omega` will decrease.
(ii) As the person starts moving from the edge towards the centre of platform, `I` goes on decreasing. Hence `omega` goes on increasing.
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Knowledge Check

  • A person is standing on the edge of a circular platform, which is moving with constant angular speed about an axis passing through its centre and perpendicular to the plane of platform. If person is moving along any radius towards axis of rotation then the angular velocity will:

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    D
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  • A person is sitting near the edge fo a rotating platfrom when he walks towards the centere, then:

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    C
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    D
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  • A train goes past a person standing at the edge of a platform at high speed. Then the person will be

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