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A gramophone record is revolving with an...

A gramophone record is revolving with an angular speed .A coin is placed at a distance r from the centre of the record.RThe coefficient of static friction is u.the coin will revolve with the record if :

A

`r gt mu g //omega ^`

B

`r le mu g//omega^2`

C

`r gt mu //omega`

D

`mu gt ug //omega`.

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JBD PUBLICATION-LAWS OF MOTION-EXAMPLE
  1. A gramophone record is revolving with an angular speed .A coin is plac...

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  2. Give one example each of position depedent force

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  3. Give one example each of time dependent force.

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  4. Give one example each of constant force

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  5. Give one example each of velocity dependent force.

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  6. Does equilibrium mean that a body is at rest?

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  7. Why do we prefer a heavy hammer to drive a nail into wood?

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  8. Action and reaction forces do not balance each other. Why?

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  9. What is the principle of working of a rocket?

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  10. What is the measure of inertia of a body?

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  11. A meteorite burns in the atmosphere before it reaches the earth's surf...

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  12. What is the relation beteen coefficient fo friction and angle of frict...

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  13. What is the relation between coefficient of friction and angle of repo...

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  14. What are the methods of reducing friction?/

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  15. The angle of friction betwen two surfaces is 30^@ ,what is coefficien...

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  16. What type of friction is involved when axle rotates in a wheel?

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  17. Arrange mus, muk and mur in descending order.

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  18. We slip easily on a rainy day because coefficient of friction

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  19. Why are ruber tyres preffered to iron tyres?

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  20. Why are aeroplanes given conical shape?

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  21. Define coefficient of friction.

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