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Why is it difficult to light a matchstic...

Why is it difficult to light a matchstick by striking it on a smooth surface ?

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To understand why it is difficult to light a matchstick by striking it on a smooth surface, we can break down the explanation into a series of logical steps: ### Step-by-Step Solution: 1. **Understanding Friction**: - Friction is the resistance that one surface or object encounters when moving over another. It is a force that can generate heat when two surfaces rub against each other. 2. **Role of Rough Surfaces**: ...
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LAKHMIR SINGH & MANJIT KAUR-FRICTION-EXERCISE
  1. Explain why : climbing a greasy pole is very difficult.

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  2. Why does a matchstick light when we strike it on a rough surface ?

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  3. Why is it difficult to light a matchstick by striking it on a smooth s...

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  4. Can two different bulbs, similar in all respect act as coherent source...

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  5. Why do brake pads of bicycles have to be replaced quite often ?

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  6. A pencil earser loses tiny pieces of rubber each time you use it. Why ...

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  7. What happen when you rub your hands vigorously for a few seconds ? Why...

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  8. Explain how, friction enables us to walk without slipping.

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  9. How does a bicycle stop when its brakes are applied ?

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  10. Explain why, the soles of our shoes wear out gradually .

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  11. Why do tyres of cars wear out gradually ?

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  12. State two advantages and two disadvantages of friction.

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  13. Explain why, sportsmen use shoes with spikes.

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  14. How will you reduce friction between those machine parts which rub ag...

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  15. What is meant by lubriication ? Why is it important ?

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  16. Explain why , wheels are so useful.

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  17. Why are lubricants (oil or greses) applied to rubbing surface of machi...

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  18. Explain, how the use of oil reduces friction between two surface in co...

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  19. Why are cars, aeroplanes and rockets streamlined ?

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  20. The equation (cos p-1) x^(2) + cos p*x + sin p = 0 where x is a varia...

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