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Cae wheels often spin on icy roads. Expl...

Cae wheels often spin on icy roads. Explain why.

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LAKHMIR SINGH & MANJIT KAUR-FRICTION-EXERCISE
  1. Iqbal has to puch a lighter box and seema has to puch a similar heavie...

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  2. Why does a man slip when he steps on banana peel thrown on the road ?

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  3. Cae wheels often spin on icy roads. Explain why.

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  4. Explain why : a pencil will write on paper but not on glass.

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  5. Explain why : climbing a greasy pole is very difficult.

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

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

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

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

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

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

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

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

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

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  15. Why do tyres of cars wear out gradually ?

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  16. State two advantages and two disadvantages of friction.

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  17. Explain why, sportsmen use shoes with spikes.

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

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

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  20. Explain why , wheels are so useful.

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