Quiz  /  Gravitation Class 12 MCQ Questions With Answers

  • 1. 
    The gravitational force between two massive spheres

  • is always an attraction.
  • depends on how massive they are.
  • depends inversely on the square of the distances betwn them.
  • all of the above

  • 2. 
    If the mass of Earth increased, with no change in radius, your weight would _____.

  • increase also
  • stay the same
  • decrease
  • None of these

  • 3. 
    In the last question, what is the magnitude of the gravitational force of the car on the Earth?

  • less than the force of the Earth on the car
  • equal to the force of the Earth on the car
  • greater than the force of the Earth on the car
  • None of these

  • 4. 
    Here the mass of the Sun is doubled, while the mass of the Earth is kept the same.

  • Fg (gravitational force between Earth and mass) is halved
  • Fg is doubled
  • Fg is quadrupled
  • Fg stays the same

  • 5. 
    Why is the gravitational force between Earth-moon different from the gravitational force between Sun-Earth

  • because the combined mass of moon and Earth is smaller
  • because the distance between mass and moon is smaller
  • both statements above are correct
  • because the Earth is not radiating energy

  • 6. 
    Which of the following is true about the Fg between two masses?

  • Fg ∝ m1m2/r
  • Fg ∝ r/m1m2
  • Fg ∝ (m1 + m2)/r
  • Fg ∝ m1m2/r2

  • 7. 
    Who discovered the Law of Gravitation?

  • Thomas Edison
  • Albert Einstein
  • Isaac Newton
  • Galileo Galilei

  • 8. 
    If you stood on a ladder so you were twice as far from Earth's center, your weight would be:

  • one-eighth its normal value
  • one-quarter its normal value
  • half its normal value
  • none of the above

  • 9. 
    Which of the following is true about the Fg and the separation distance between two masses

  • Fg ∝ r
  • Fg ∝ r2
  • Fg ∝ 1/r
  • Fg ∝ 1/r2

  • 10. 
    What happens when the gravitational Force between the Earth and the Sun is suddenly removed?

  • The Earth will crash towards the sun
  • The Earth will follow a linear path directed South in this picture
  • The Earth will continue to follow a circular path
  • The Earth will follow a linear path directed West in this picture

  • 11. 
    The distance between the Earth and the moon is tripled, what happens to the Fg between them?

  • 1/3 bigger
  • 3 times bigger
  • 1/9 bigger
  • 9 times bigger

  • 12. 
    What is the direction of the velocity of the Earth?

  • to the left
  • to the right
  • downward
  • upward
  • towards the center of the Sun

  • 13. 
    Jupiter is a much more massive planet than Earth. If you traveled to Jupiter, your mass would

  • increase
  • decrease
  • remain the same
  • All of above

  • 14. 
    Here the mass of the EARTH is doubled, while the mass of the Sun stays the same. Fg...

  • is doubled for the Earth but stays the same for the Sun
  • is halved
  • is doubled
  • stays the same

  • 15. 
    If the mass of the Sun is doubled, while that of the Earth is halved, then the Fg between them

  • is halved
  • is doubled
  • is 1.5 times greater than the original
  • stays the same

  • 16. 
    The neutrino is a massless particle. Can it interact gravitationally with the Earth?

  • yes, because the Earth is big enough it can compensate for the massless neutrino
  • yes, especially when the neutrino is near the Earth's surface
  • yes, when the neutrino orbits around the Earth
  • no

  • 17. 
    What does the small proportionality constant (G) for Fg ∝ m1m2/r2 imply?

  • that two objects with really small masses have negligible Fg between them
  • that two objects with really small masses have a strong Fg between them
  • that two objects with really big masses have negligible Fg between them
  • that Fg only acts between two objects with big masses

  • 18. 
    Here both the mass of the Earth and the sun are doubled.

  • Fg is doubled
  • Fg is tripled
  • Fg is quadrupled
  • Fg is reduced by a quarter

  • 19. 
    Formula for getting the weight, or gravitational force, of objects near the Earth's surface.

  • w = m/g
  • w =mg2
  • w = mg/2
  • w = mg

  • 20. 
    The gravitational force between the Sun and the Earth

  • points away from each other
  • points toward each other
  • for the sun, pointing upwards; for the earth, pointing downwards
  • only the sun exerts a gravitational force on the Earth

  • 21. 
    Comparing the value of the gravitational force that the Earth and sun exerts on each other,

  • F on earth > F on sun
  • F on sun > F on earth
  • F on sun = F on earth
  • F on sun is nonzero, F on earth = 0

  • 22. 
    Here we halved the distance between the Moon and the Earth. What happens to their Fg?

  • The Fg is halved
  • The Fg doubles
  • The Fg is quadrupled
  • The Fg is one-fourthed

  • 23. 
    The gravitational force

  • can be attractive or repulsive
  • is tangential to the orbital path
  • is always repulsive
  • Is always attractive

  • 24. 
    Which of the following statements is most true about Newton's law of gravitation?

  • It is a force that objects with big mass apply on objects with much smaller masses.
  • It is a force that exists between any two bodies with mass
  • It is a force that exists between planets, stars and other heavenly bodies.
  • It is a force that pushes objects around a circle in orbit.

  • 25. 
    The Fg acting on Earth

  • changes only the magnitude of the Earth's velocity
  • changes the magnitude and direction of the Earth's velocity
  • changes only the direction of the Earth's velocity
  • doesn't affect the velocity of the Earth
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