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What is rolling friction ? How does it a...

What is rolling friction ? How does it arise ?

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ICSE-FRICTION-Short answer question
  1. Explain the laws of kinetic friction.

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  2. Define the coefficient of static friction and kinetic friction.

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  3. What is angle of friction?

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  4. Define angle of repose. Is this angle equal to the angle of friction ?

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  5. In the case of a body sliding down a rough inclined plane show that mu...

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  6. What is rolling friction ? How does it arise ?

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  7. What is the relation connecting rolling friction and the radius of the...

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  8. "Friction is a necessary evil". Why ?

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  9. Name four different methods of reducing friction.

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  10. What are antifriction metals ?

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  11. Name a few methods of increasing friction.

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  12. "A horse has to pull a cart harder during the first few metres of its ...

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  13. "Rosin is rubbed on the violin bow ". Why ?

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  14. Derive an expression for the acceleration of a body sliding down a rou...

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  15. Explain why a high pressure tyre roll more easily than a low pressure ...

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  16. The surfaces of the train wheels and railway tracks are made smooth "....

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  17. A body moving on a surface is brought to rest suddenly. What happens t...

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  18. "In hilly areas, sand is thrown on tracks covered with snow ". Why ?

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  19. "Proper inflation of tyres can save fuel". Explain how ?

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  20. Explain why the shapes of high-speed vehicles are streamlined ?

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