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Why does a body becomes weightless at th...

Why does a body becomes weightless at the centre of earth ?

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MBD-GRAVITATION-Example
  1. Why is G called universal gravitational constant ?

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  2. Is the value of 'g' at a given place same for different bodies or it i...

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  3. Why does a body becomes weightless at the centre of earth ?

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  4. A tennis ball jumps higher at hills than at planes. Explain.

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  5. The weight of an object on the surface of earth is 9.8 N. What does th...

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  6. What type of motion a freely falling body execute under gravity ?

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  7. Give points of difference between Acceleration due to gravity (g) and ...

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  8. You buy weight of sugar at a place situated on equitorial line and the...

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  9. Why cannot we move a finger without disturbing all the stars ?

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  10. Distinguish between Gravitation and Gravity.

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  11. Explain why a small piece of stone is not attracted towards another bi...

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  12. The earth attracts an apple. Does the apple also attract with earth ? ...

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  13. If the force of gravity somehow vanishes today, why would we be sent b...

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  14. What is meant by density and relative density ?

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  15. What do you mean by buoyancy? In which direction does the buoyant forc...

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  16. State Archimedes' principle.

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  17. Name two forces which act on a body immersed in a liquid. Give the dir...

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  18. How is submarine able to move on water surface as well as go under wat...

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  19. Give reason when Big buildings and dams have wide foundations for safe...

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  20. A steel needle sinks in water but a steel ship floats. Explain how ?

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