7 Gravitation
Prepared by Vinodkumar M, HSST Physics, St. Aloysius HSS, Elthuruth, Thrissur
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1.  The value of acceleration due to gravity is maximum at the *
1 point
2. The height at which g is reduced to g / 2 ..............(There may be more than one answers) *
2 points
3. A rat and horse are to be projected to space from earth. Choose the correct alternative *
1 point
4.  Relation connection connecting orbital and escape velocity *
1 point
5.  Escape speed of an object from the earth
1 point
Clear selection
6. The earth contains an atmosphere but the moon does not because.............. *
0 points
7. Time period of a simple pendulum inside a satellite orbiting earth is.........(Period on earth = T) *
2 points
8. As height increases, the acceleration due to gravity *
1 point
9. When a body is taken to a depth, its acceleration due to gravity *
1 point
10. The relation between acceleration due to gravity g and gravitational constant G is ......... *
1 point
11. The graph showing the variation of g with depth and height from the surface of earth assuming density of earth is constant *
2 points
12. An earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers directly over the equator, that revolves in the same direction the earth rotates (west to east). *
1 point
13. Moon has no atmosphere because *
1 point
14. Distance to the moon from earth is 3.84 x 10^8 m and the time period of moon's revolution is 27.3 days. Obtain the mass of the earth. (Gravitational constant, G = 6.67 x 10^-11 Nm^2 / kg^2) *
2 points
15. Why does satellite need no fuel to go around a planet in its fixed orbit? *
1 point
16. Acceleration due to gravity is independent of ........... *
1 point
17. For a particle to overcome the gravitational pull of the earth, it is projected with a minimum velocity called................ *
1 point
18. A ball bounces more on the surface of the moon than on the earth because *
1 point
19. For a planet revolving around the sun, the areal velocity is a constant. This is ............ *
1 point
20. The escape velocity of a planet is 20 km /s. The orbital velocity of the smallest possible orbit is ....... *
2 points
21. An artificial satellite orbiting the earth is at a height of 3400 km from the surface of the earth. If the radius of earth is 6400 km, and g = 9.8 m/s^2, the orbital velocity of the satellite is ............... *
3 points
22. Energy possessed by a body due to gravitational field of earth is ............ *
1 point
23. The maximum value of gravitational potential is *
2 points
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