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Is it possible to shield a body from gra...

Is it possible to shield a body from gravitational effects?

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We can shield a charge from electric fields by putting it inside a hollow conductor. Can we shield a body from the gravitational influence of nearby matter by putting it inside a hollw sphere or by some other means ?

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Answer the following: (a) You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means? (b) An astronaut inside a small spaceship orbiting around the Earth cannot detect gravity. If the space station orbiting around the Earth has a large size, can he hope to detect gravity? (c) If you compare the gravitational force on the Earth due to the Sun to that due to the Moon, you would find that the Sun’s pull is greater than the Moon’s pull. (You can check this yourself using the data available in the succeeding exercises). However, the tidal effect of the Moon’s pull is greater than the tidal effect of Sun. Why?

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MODERN PUBLICATION-GRAVITATION-Revision Exercises (very short answer questions)
  1. When a body falls towards Earth, Earth moves towards the body. Why is ...

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  2. Spheres of the same material and same radius r are touching each other...

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  3. Is it possible to shield a body from gravitational effects?

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  4. If a body of mass m is taken to the surface of moon, how will the iner...

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  5. The weight of a body at the centre of the earth is

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  6. What is the gravitational force between two bodies at an infinite dist...

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  7. What is the direction of force of gravity on a body?

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  8. What is the value of the acceleration due to gravity at a height equal...

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  9. If the diameter and mass of the earth becomes twice of its original va...

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  10. Where is 'g' greater, at poles or at equator ?

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  11. How the value of g changes as one moves from equator to pole?

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  12. How the value of g changes with increase in latitude of a place?

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  13. What is the unit and dimensional formula of gravitaional intensity?

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  14. What is the value of gravitational intensity at the surface of Earth a...

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  15. Define orbital speed of a satellite.

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  16. What is the direction of the orbital speed of a orbiting satellite?

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  17. What is the direction and orbital speed of a geostationary satellite?

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  18. Time period of revolution of polar satellite is around

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  19. What is the escape speed of the Sun ?

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  20. Give two examples of geostationary satellites.

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