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Why aeroplanes and cars have streamline ...

Why aeroplanes and cars have streamline shape?

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Aeroplanes and cars have streamline shape in order to reduce the friction of air. During motion, all particles coming in front of them will be directed tangentially. So they can move with greater speed easily.
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PREMIERS PUBLISHERS-PROPERTIES OF MATTER-OTHER IMPORTANT QUESTION & ANSWERS (CONCEPTUAL QUESTIONS)
  1. Out of friction force and viscous force which depends upon velocity.

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  2. What will be the velocity of water when it passes from narrow tube to ...

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  3. Two identical solid balls, one of ivory and the other of wet-clay, are...

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  4. Why aeroplanes and cars have streamline shape?

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  5. How do insects run on the surface of water?

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  6. Why hot water is preferred to cold water for washing clothes?

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  7. Why the blood pressure in humans is greater at the feet than at the br...

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  8. A person standing near a speeding train has a danger of falling toward...

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  9. Why a small bubble rises slowly through a liquid whereas the bigger bu...

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  10. Mercury does not wet the glass. Why?

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  11. A needle floats in clean water, but sinks in soap solution. Why?

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  12. A piece of chalk when immersed in water emits bubbles. Why?

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  13. Small bits of camphor dance about in clear water but not on one contam...

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  14. Oil calms the stormy waves on the sea. Why?

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  15. Why is sand drier than clay?

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  16. Two streamlines cannot cross each other. Why ?

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  17. Why is the tip of the nib of a pen split?

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  18. Why tiny drops of fog act as rigid bodies?

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  19. Small drops of mercury are found to assume a spherical shape. Why?

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  20. Why does a stone sink when placed on the surface of water?

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