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Theoretically which of the following are...

Theoretically which of the following are best lubricants ? .

A

Solids

B

Liquids

C

Gases

D

Both 2 and 3

Text Solution

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The correct Answer is:
C
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NARAYNA-LAW OF MOTION-C.U.Q
  1. Maximum value of static friction is .

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  2. A good lubricant should be highly

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  3. Theoretically which of the following are best lubricants ? .

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  4. A block 'B' rests on 'A' A rests on a horizontal surface 'C' which is ...

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  5. Sand is dusted to the railway tracks during rainy season to .

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  6. With increase of temperature the friction force acting between two sur...

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  7. If we imagine ideally smooth surfaces and it they are kept in contact,...

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  8. If man is walking direction of friction is .

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  9. Aeroplanes are streamlined to reduce .

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  10. The limiting friction between two surface does not depend

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  11. While walking on ice one should take small steps to avoid slipping. Th...

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  12. In order to stop a car in shortest distance on a horizontal road, one ...

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  13. A body rests on a rough horizontal plane. A force is applied to the bo...

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  14. A lift is moving down with an acceleration equal to the acceleration d...

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  15. A body is struck to the front part of the truck. The coefficient of fr...

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  16. When a bicycle is in motion, the force of friction exerted by the grou...

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  17. A boy of mass M is applying a horizontal force to slide a box of mass ...

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  18. When a person walks on a rough surface

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  19. The maximum speed of a car on a curved path of radius 'r' and the coef...

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  20. The angle which the rough inclined plane makes with the horizontal whe...

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