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How does the lubrication of a machine he...

How does the lubrication of a machine help in reducing friction ?

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PRADEEP-LAWS OF MOTION-Short Answer Questions
  1. Why is it difficult to climb up a greasy pole ?

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  2. Why frictional force gets increased when two surfaces in contact are p...

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  3. For looping a loop of radius 4 m through what minimum height should a ...

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  4. Why are the passengers thrown outwards when a car in which they are tr...

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  5. A motor cyclist is going in a vertical circle what is the necessary co...

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  6. For oscillation of a simple pendulum of length L what is the maximum p...

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  7. The driver of a truck travelling with a velocity upsilon suddenly noti...

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  8. A particle moves in a circle of radius 20 cm Its linear speed is given...

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  9. Explain static friction and kintic friction Can value of kinetic frict...

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  10. Explain the origin of (i) sliding friction (ii) the rolling friction .

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  11. Explain that static friction is a self adjusting force .

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  12. Explain the terms (i) angle of friction (ii) coefficient of friction a...

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  13. Derive an expression for acceleration of a body down a rough inclined ...

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  14. Calculate the amount of work done in moving a body up a rough inclined...

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  15. Why are the curved roads banked ? Obtain an expression for angle of ba...

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  16. Discuss the bending of a cyclist while describing a curved path Find t...

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  17. How does the lubrication of a machine help in reducing friction ?

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  18. Why does water from a bucket not spill even when it is upside down whi...

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  19. Establish that friction is a necessary evil

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  20. Explain centripetal force and centrifugal force Can they balance each ...

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