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GRAVITATION MCQs

Total Questions : 50 | Page 3 of 5 pages
Question 21. The mass of the Earth is
  1.    6 × 1026
  2.    6 × 1024
  3.    8 × 1024
  4.    7 × 1024
 Discuss Question
Answer: Option B. -> 6 × 1024
Question 22. The height of geostationary satellite is about
  1.    56,890 km
  2.    45,000 km
  3.    33,500 km
  4.    42,300 km
 Discuss Question
Answer: Option D. -> 42,300 km
Question 23. What does the small proportionality constant (G) for Fg ∝ m1m2/r2 imply?
  1.    that two objects with really small masses have negligible Fg between them
  2.    that two objects with really small masses have a strong Fg between them
  3.    that two objects with really big masses have negligible Fg between them
  4.    that Fg only acts between two objects with big masses
 Discuss Question
Answer: Option A. -> that two objects with really small masses have negligible Fg between them
Question 24. Everybody in the universe attracts every other body with the force which is directly proportional to the product of their masses and inversely proportional to the square of distance between their centers, this statement is known as
  1.    law of friction
  2.    law of gravitation
  3.    law of motion
  4.    law of momentum
 Discuss Question
Answer: Option B. -> law of gravitation
Question 25. Orbital velocity(vo) is equal to
  1.    √[gh(R + h)]
  2.    √[gh(R - h)]
  3.    √[gh ⁄ (R - h)]
  4.    √[gh ⁄ (R + h)]
 Discuss Question
Answer: Option A. -> √[gh(R + h)]
Question 26. As we go farther away from the Earth, the gravitational force becomes
  1.    constant
  2.    stronger
  3.    weaker
  4.    positive
 Discuss Question
Answer: Option C. -> weaker
Question 27. Moon is a
  1.    natural satellite
  2.    artificial satellite
  3.    not a satellite
  4.    none of above
 Discuss Question
Answer: Option A. -> natural satellite
Question 28. The weight of body is due to force of gravitation between body and
  1.    earth
  2.    other bodies
  3.    atmosphere
  4.    water
 Discuss Question
Answer: Option A. -> earth
Question 29. Earth's gravitational force of attraction vanishes at
  1.    6400 km
  2.    infinity
  3.    6900 km
  4.    10000 km
 Discuss Question
Answer: Option B. -> infinity
Question 30. The weight of an object if the value of g on moon is 1
  1.    100 N
  2.    160 N
  3.    1000 N
  4.    1600 N
 Discuss Question
Answer: Option B. -> 160 N

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