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 8 of 14
- A. Half
- B. Zero
- C. Unchanged
- D. Doubled
Explanation: The Explanation for this question will be added soon!
Correct answer: Zero- A. 980 N
- B. 490 N
- C. 1380 N
- D. None of above
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Correct answer: None of above- A. Zero
- B. 98 N
- C. 9.8 N
- D. 10 N
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Correct answer: Zero- A. Non-spherical shape
- B. Daily rotation
- C. Non-spherical shape and daily rotation
- D. None of these
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Correct answer: Non-spherical shape and daily rotation- A. Frictional force
- B. Electrostatic force
- C. Gravitational force
- D. Magnetic force
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Correct answer: Frictional force- A. Acceleration due to gravity g
- B. Electronic charge e
- C. Plank's constant h
- D. Gravitational constant G
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Correct answer: Acceleration due to gravity g- A. Performs S.H.M
- B. Sticks to the side of the side
- C. Stops at the centre of the earth
- D. Drops to the other side
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Correct answer: Performs S.H.M- A. Depth of the place
- B. Longitude of the place
- C. Altitude of the place
- D. Latitude of the place
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Correct answer: Latitude of the place- A. He will continue moving in the orbit
- B. He will fall to the earth
- C. He will go to the outer space
- D. None of these
Explanation: A is correct. As the astronaut was initially in a stable orbit around a celestial body (like Earth) and then the life belt was cut, the…
Correct answer: He will continue moving in the orbit- A. 176.5 N
- B. 240 N
- C. 122.5 N
- D. Zero
Explanation: D is the correct option. As the body is placed in space ship the centrifugal force experienced by it balances the gravitational pull due…
Correct answer: Zero- A. Increase and then decrease
- B. Decrease and then increase
- C. Increase
- D. Decrease
Explanation: In an elevator that initially accelerates upward from rest and then ascends with uniform speed, the effective gravitational force…
Correct answer: Decrease and then increase- A. Each goes on decreasing
- B. Each remains unaltered
- C. B goes on decreasing and that of A goes on increasing
- D. A goes on decreasing and that of B goes on increasing
Explanation: A is correct. The value of g decreases up to 0 as we go toward the center of the Earth, and it also decreases as we go away from the…
Correct answer: Each goes on decreasing- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: D is the correct option. As the body is moving upwards, 2 unbalanced forces are acting on the body, weight and the apparent weight (or the…
Correct answer: Option D- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: A is correct as per the derived formula by equating gravitational acceleration and centripetal acceleration.
Correct answer: Option A- A. Both masses is same
- B. 1 kg is greater than that of 10 kg
- C. 10 kg is greater that that of 1 kg
- D. Both masses is zero
Explanation: Gravitational acceleration on the mass of 1kg is = G x 10/12 =10 GSimilarly, gravitational acceleration on the mass of 10kg is = 1GHence…
Correct answer: 1 kg is greater than that of 10 kg- A. 2 kg
- B. 1 kg
- C. 0.5 kg
- D. 4 kg
Explanation: F=Gmm/R2 As F= 6.67 x10-11 N, it can be seen that F=G and this is only possible when the product of masses is equal to 1.This can also be…
Correct answer: 1 kg- A. 1080 N
- B. 880 N
- C. 980 N
- D. 100 N
Explanation: As the escalator is descending downwards with some acceleration, the formula to calculate the apparent weight becomes = mg-maEntering the…
Correct answer: 880 N- A. 9 x 10^9 N
- B. 6.67 x 10^-11 N
- C. 3 x 10^-11N
- D. 8.8 x 10^-12 N
Explanation: F=GMm/R2 As the distance and both the masses are equal to 1, F= G Where G is a universal gravitational constant with the value of 6.67 x…
Correct answer: 6.67 x 10^-11 N- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The orbital velocity is inversely proportional to the square root of the radius (considering G and M to be constants). Hence A is correct.
Correct answer: Option A- A. 4.9 m/sec2
- B. 9.8 m/sec2
- C. 19.6 m/sec2
- D. 2.45 m/sec2
Explanation: Gravitational acceleration on Earth = GM/R2 Gravitational acceleration on another planet with mass and radius half = G(0.5M)/0.25R2…
Correct answer: 19.6 m/sec2