Gravitation MCQs
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Gravitation MCQs
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20 Questions

1. Assertion : If earth suddenly stops rotating about its axis, then the value of acceleration due to gravity will become same at all the places. Reason : The value of acceleration due to gravity depends upon the rotation of the earth.
2. In a gravitational field, at a point where the gravitational potential is zero
3. If the earth is at one-fourth of its present distance from the sun, the duration of the year will be
4. At what height from the ground will the value of g be the same as that in 10 km deep mine below the surface of earth?
5. Kepler’s second law may be stated as 'under the influence of central force, in equal interval of time, position vector sweeps out equal\r\n
6. If the distance of earth is halved from the sun, then the no. of days in a year will be
7. particle is suspended from a spring and it stretches the spring by 1 cm on the surface of earth. By how much amount the same particle will stretch the same spring at a place 800 km above the surface of earth.
8. Newton's universal law of gravitation applies to
9. In some region, the gravitational field is zero. The gravitational potential in this region.
10. The value of G varies with
11. The ratio of radii of earth to another planet is 2/3 and the ratio of their mean densities is 4/5. If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximum height he can jump on the planet is
12. Consider Earth to be a homogeneous sphere. Scientist A goes deep down in a mine and scientist B goes high up in a balloon. The gravitational field measured by
13. Average density of the earth
14. "In planetary motion"
15. Force of gravitational attraction is least
16. If the earth were to rotates faster than its present speed, the weight of an object will
17. The speed of earth’s rotation about its axis is w. Its speed is increases to x times to make the effective acceleration due to gravity equal to zero at the equator. Then x is
18. Where will it be profitable to purchase one kilogram sugar?
19. The height of the point vertically above the earth's surface, at which acceleration due to gravity becomes 1% of its value at the earth's surface is (Radius of the earth = R)
20. Earth is flattened at poles, bulged at the equator. This is due to

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