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If a person standing on a rotating disc ...

If a person standing on a rotating disc stretches out his hands, the angular speed will

A

Increase

B

Decrease

C

Remain same

D

None of the these

Text Solution

Verified by Experts

The correct Answer is:
B
A person stretches his hands outward, hence moment of inertia, I = increases.
L=1w = constant, So w decreases.
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CBSE COMPLEMENTARY MATERIAL-ROTATIONAL MOTION -MULTIPLE CHOICE QUESTIONS
  1. For which of the following does the centre of mass lie outside the bod...

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  2. When a disc rotates with uniform angular velocity, which of the follow...

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  3. Two identical particles move towards each other with velocity 2v and v...

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  4. A circular disc of radius R is removed from a bigger circular d...

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  5. Distance of the centre of mass of a solid uniform cone from its vertex...

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  6. Angular momentum of the particle rotating with a central force is con...

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  7. Four point masses, each of value m, are placed at the corners of a squ...

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  8. A couple is acting on a two particle system. The resultant motion will...

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  9. Dimensions of angular momentum are

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  10. Moment of inertia of a body does not depend on

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  11. One circular ring and one circular disc, both are having the same mass...

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  12. What is the ratio of the moments of inertia of two rings radii r and n...

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  13. Two rings of radius R and nR made of same material have the ratio of m...

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  14. The moment of inertia of a ring about one of its diameters is I.What w...

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  15. If a person standing on a rotating disc stretches out his hands, the a...

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  16. A solid sphere is rolling without slipping on a horizontal plane. The ...

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  17. A solid sphere of radius 'r' is rolling with velocity V on a smooth pl...

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  18. Two bodies have their moments of inertia I and 2 I respectively about ...

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  19. An inclined plane makes an angle 30° with the horizontal. A solid sphe...

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  20. The motion of planets in the solar system is an exmaple of the conserv...

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