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Send is spread on tracks covered with sn...

Send is spread on tracks covered with snow. Why ?

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Covering of snow laid tracks with sand increases the force of friction between the road and the wheels Therefore , chances of slipping & skidding reduce .
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PRADEEP-LAWS OF MOTION-conceptual problmes
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  2. Why is it difficult to move a bike with its brakes on ?

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  3. Send is spread on tracks covered with snow. Why ?

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  4. When a weel is rolling on a level , what is the directionv of fricctio...

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  8. A block is gently placed at the top of an inclined plane 6.4 m long . ...

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  9. How does a lubricant help in reducing friction ?

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  10. When a person walks on a rough surface, the frictional force exerted b...

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  11. Can coefficient of friction exceed unity ?

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  12. Why are ball bearings used in machinery ?

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  13. Write a note on banking of roads.

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  14. A horse pulling a cart has to apply a greater force to start the cart ...

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  15. How does banking of roads reduce wear and tear of the tyres ?

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  16. Why has a horse to pull a cart harder during the first few steps of hi...

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  17. Why does a cyclist lean to one side while going along a curve ? In wha...

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  18. A stone tied at the end of sring is whirled in a circle. If the string...

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  19. Why does a child in a merry - go - round press the side of his seat ra...

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  20. What is the source of centripetal force , when an electron revolves ar...

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