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You can shled 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 ?

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(a)  No. A body cannot be shielded from the gravitational influence of nearby matter. Gravitation forces are independent of medium.
(b) Yes. If the size of the spaceship is extremely large then the gravitational effect of the spaceship may become measurable. The variation in g can also be detected.
(c) Tidal effect depends inversely on the cube of the distance, unlike force which depends inversely on the square of the distance. Since distance of moon from the ocean water is very small as compared to the distance of sun from the ocean water on earth. Therefore, the tidal effect of moon.s pull is greater than the tidal effect of sun. These effect can be shown below for moon and sun.
`:. T_m/T_s=((d_s)/(d_m))^3=((1.5xx10^11)/(3.8 xx10^8))^3`
`:. T_m/T_s=6.15xx10^6`
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KUMAR PRAKASHAN-GRAVITATION-Section - B Numerical From Textual Exercise (Answer the following:)
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  2. Acceleration due to gravity is independent of mass of the earth/mass o...

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  3. Suppose there existed a planet that went around the Sun twice as fast ...

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  4. In one of the satellites of Jupiter has an orbital period of 1.769 day...

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  5. Let us assume that our galaxy consists of 2.5 x× 10^(11) stars each of...

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  6. Choose the correct alternative : (a) If the zero of potential energy...

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  7. Does the escape speed of a body from the earth depend on (a) the mass ...

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  8. A comet orbits the sun in a highly elliptical orbit. Does the comet ha...

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  9. Which of the following symptoms is likely to afflict an astronaut in s...

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  10. In the following two exercises, choose the correct answer from among t...

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  11. For the above problem, the direction of the gravitational intensity at...

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  12. A rocket is fired from the earth towards the sun. At what distance fro...

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  13. How will you ‘weigh the sun’, that is estimate its mass? The mean orbi...

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  14. A saturn year is 29.5 times the earth year. How far is the saturn from...

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  15. A body weighs 63 N on the surface of the earth. What is the gravitatio...

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  16. Assuming the earth to be a sphere of uniform mass density, how much wo...

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  17. A rocket is fired vertically with a speed of 5 km s^(-1) from the eart...

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  18. The escape speed of a projectile on the earth’s surface is 11.2 km s^(...

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  19. A satellite orbits the earth at a height of 400 km above the surface. ...

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  20. Two stars each of one solar mass (= 2 xx 10^(30) kg)   are approaching...

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