Free Gravitation MCQs with Answers
265 Gravitation MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
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265 questions · page 13 of 27
121. The minimum velocity of projection to go out from the earth's gravitational pull is called:
- A. Terminal velocity
- B. Escape velocity
- C. Angular velocity
- D. Orbital velocity
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Correct answer: Escape velocity122. Newton's law of gravitation applies to:
- A. Small bodies only
- B. Planets only
- C. Both small and big bodies
- D. Only valid for solar system
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Correct answer: Both small and big bodies123. The weight of a man is equal to the force of gravity acting on it when:
- A. The elevator is at rest
- B. The elevator moves up with an acceleration 'a'
- C. The elevator moves down with an acceleration 'a'
- D. None of these
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Correct answer: The elevator is at rest124. Inertial mass is:
- A. Equal to gravitational mass
- B. Less than gravitational mass
- C. More than gravitational mass
- D. Not related to gravitational mass at ordinary speed
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Correct answer: Equal to gravitational mass125. The acceleration due to gravity on a planet with mass and radius half that of earth will be:
- A. g
- B. 2g
- C. g/2
- D. g/4
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Correct answer: g/2126. If the distance between two masses is doubled and their masses are also doubled, the gravitational force:
- A. Becomes five times
- B. Becomes half
- C. Becomes doubled
- D. Remains unchanged
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Correct answer: Remains unchanged127. The gravitational force with which earth attracts the moon:
- A. Is smaller than the force with which moon attracts the earth
- B. Is greater than the force with which moon attracts the earth
- C. Is equal to the force with which moon attracts the earth
- D. The fact is yet to be established
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Correct answer: Is equal to the force with which moon attracts the earth128. A body is taken from the earth's surface to the moon, the weight of the body will be zero at a point where force of attraction due to:
- A. The earth is zero
- B. The moon is zero
- C. The moon and earth is equal and opposite
- D. Both the moon and earth is zero
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Correct answer: The moon and earth is equal and opposite129. A satellite orbiting the earth receives centripetal force from:
- A. Gravitational pull of the sun on the satellite
- B. Gravitational pull of the earth on the satellite
- C. The rocket engine attached to the satellite
- D. None of the above
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Correct answer: Gravitational pull of the earth on the satellite130. If the distance between two bodies is doubled, the gravitational force between them becomes:
- A. Double
- B. Half of the original value
- C. One third of the original value
- D. One fourth of the original value
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Correct answer: One fourth of the original value