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- Why does a body becomes weightless at the centre of earth ?
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- A tennis ball jumps higher at hills than at planes. Explain.
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- The weight of an object on the surface of earth is 9.8 N. What does th...
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- What type of motion a freely falling body execute under gravity ?
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- Give points of difference between Acceleration due to gravity (g) and ...
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- You buy weight of sugar at a place situated on equitorial line and the...
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- Why cannot we move a finger without disturbing all the stars ?
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- Distinguish between Gravitation and Gravity.
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- Explain why a small piece of stone is not attracted towards another bi...
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- The earth attracts an apple. Does the apple also attract with earth ? ...
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- If the force of gravity somehow vanishes today, why would we be sent b...
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- What is meant by density and relative density ?
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- What do you mean by buoyancy? In which direction does the buoyant forc...
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- State Archimedes' principle.
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- Name two forces which act on a body immersed in a liquid. Give the dir...
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- How is submarine able to move on water surface as well as go under wat...
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- Give reason when Big buildings and dams have wide foundations for safe...
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- A steel needle sinks in water but a steel ship floats. Explain how ?
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- Give reasons for the following :A sharp blade is more effective in cut...
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- Give reasons for the following :A cork piece floats but an iron piece ...
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