1. Who discovered the law of gravitation?
A) Albert Einstein
B) Isaac Newton
C) Galileo Galilei
D) Faraday
Answer: B) Isaac Newton
Q2. The force of gravitation exists between:
A) Only planets
B) Only stars
C) Any two masses
D) Charged bodies only
Answer: C) Any two masses
Q3. The SI unit of gravitational force is:
A) Joule
B) Newton
C) Watt
D) Pascal
Answer: B) Newton
Q4. The gravitational force between two bodies increases when:
A) Distance increases
B) Masses decrease
C) Masses increase
D) Both masses become zero
Answer: C) Masses increase
Q5. According to Newton’s law of gravitation, force is inversely proportional to:
A) Distance
B) Square of distance
C) Cube of distance
D) Mass
Answer: B) Square of distance
Q6. The value of universal gravitational constant (G) is:
A) 6.67 × 10⁻¹¹ Nm²kg⁻²
B) 9.8 m/s²
C) 3 × 10⁸ m/s
D) 1.6 × 10⁻¹⁹ C
Answer: A) 6.67 × 10⁻¹¹ Nm²kg⁻²
Q7. The acceleration due to gravity on Earth is approximately:
A) 8.9 m/s²
B) 9.8 m/s²
C) 10.8 m/s²
D) 12 m/s²
Answer: B) 9.8 m/s²
Q8. Weight is equal to:
A) mg
B) m/g
C) g/m
D) m²g
Answer: A) mg
Q9. Weight is a:
A) Scalar quantity
B) Vector quantity
C) Dimensionless quantity
D) Constant quantity
Answer: B) Vector quantity
Q10. Mass is measured in:
A) Newton
B) Joule
C) Kilogram
D) Watt
Answer: C) Kilogram
Q11. Weight of a body changes because:
A) Mass changes
B) Gravity changes
C) Density changes
D) Volume changes
Answer: B) Gravity changes
Q12. A person will weigh least on:
A) Earth
B) Jupiter
C) Moon
D) Sun
Answer: C) Moon
Q13. The mass of a body on the Moon compared to Earth is:
A) Half
B) One-sixth
C) Same
D) Double
Answer: C) Same
Q14. The weight of a body on the Moon is about:
A) Same as Earth
B) Twice that on Earth
C) One-sixth that on Earth
D) Zero
Answer: C) One-sixth that on Earth
Q15. The force keeping planets in orbit is:
A) Magnetic force
B) Electric force
C) Gravitational force
D) Nuclear force
Answer: C) Gravitational force
Q16. Gravitational force is always:
A) Repulsive
B) Attractive
C) Zero
D) Variable
Answer: B) Attractive
Q17. Which quantity remains constant everywhere?
A) Weight
B) Gravity
C) Mass
D) Pressure
Answer: C) Mass
Q18. The gravitational force between Earth and Moon is an example of:
A) Contact force
B) Magnetic force
C) Field force
D) Frictional force
Answer: C) Field force
Q19. The acceleration due to gravity at the center of Earth is:
A) 9.8 m/s²
B) 4.9 m/s²
C) Zero
D) Infinite
Answer: C) Zero
Q20. The unit of acceleration due to gravity is:
A) m/s
B) kg
C) m/s²
D) N
Answer: C) m/s²
Numerical and Formula-Based MCQs
Q21. Which formula represents Newton’s law of gravitation?
A) F = ma
B) F = Gm₁m₂/r²
C) P = mv
D) V = IR
Answer: B) F = Gm₁m₂/r²
Q22. Weight of a 5 kg object on Earth is:
A) 49 N
B) 5 N
C) 9.8 N
D) 98 N
Answer: A) 49 N
Q23. Weight of a 10 kg body on Earth is:
A) 98 N
B) 10 N
C) 9.8 N
D) 100 N
Answer: A) 98 N
Q24. If mass doubles, gravitational force becomes:
A) Half
B) Double
C) Four times
D) Unchanged
Answer: B) Double
Q25. If distance between two masses doubles, force becomes:
A) Double
B) Four times
C) One-fourth
D) Half
Answer: C) One-fourth
Q26. Weight of a 2 kg body is:
A) 19.6 N
B) 9.8 N
C) 2 N
D) 20 N
Answer: A) 19.6 N
Q27. A 50 kg person weighs approximately:
A) 98 N
B) 490 N
C) 50 N
D) 5000 N
Answer: B) 490 N
Q28. A body weighs 60 N. Its mass is:
A) 3.1 kg
B) 6.1 kg
C) 9.8 kg
D) 60 kg
Answer: B) 6.1 kg
Q29. Weight of a 12 kg body is:
A) 117.6 N
B) 120 N
C) 12 N
D) 98 N
Answer: A) 117.6 N
Q30. The formula for acceleration due to gravity is:
A) g = GM/R²
B) g = mR
C) g = R²/M
D) g = GMR²
Answer: A) g = GM/R²
Q31. If distance becomes three times, force becomes:
A) 1/3
B) 1/6
C) 1/9
D) 3 times
Answer: C) 1/9
Q32. Weight of a 1 kg object is approximately:
A) 1 N
B) 9.8 N
C) 98 N
D) 0.98 N
Answer: B) 9.8 N
Q33. Weight on Moon of a body weighing 60 N on Earth is:
A) 60 N
B) 30 N
C) 10 N
D) 360 N
Answer: C) 10 N
Q34. A body of mass 20 kg has weight:
A) 196 N
B) 98 N
C) 20 N
D) 200 N
Answer: A) 196 N
Q35. The dimensions of G are:
A) MLT⁻²
B) M⁻¹L³T⁻²
C) LT⁻²
D) MLT⁻¹
Answer: B) M⁻¹L³T⁻²
Q36. If both masses are doubled, force becomes:
A) Double
B) Four times
C) Eight times
D) Half
Answer: B) Four times
Q37. Weight of a 15 kg body is:
A) 147 N
B) 150 N
C) 15 N
D) 98 N
Answer: A) 147 N
Q38. A body weighing 98 N has mass:
A) 5 kg
B) 10 kg
C) 15 kg
D) 20 kg
Answer: B) 10 kg
Q39. Weight of a 30 kg body on Moon is approximately:
A) 49 N
B) 294 N
C) 180 N
D) 30 N
Answer: A) 49 N
Q40. If distance is halved, gravitational force becomes:
A) Half
B) Double
C) Four times
D) One-fourth
Answer: C) Four times
Theoretical MCQs
Q41. Which scientist experimentally determined G?
A) Newton
B) Cavendish
C) Einstein
D) Kepler
Answer: B) Cavendish
Q42. Artificial satellites revolve around Earth due to:
A) Magnetic force
B) Electrostatic force
C) Gravity
D) Friction
Answer: C) Gravity
Q43. Which of the following is not affected by gravity?
A) Falling stone
B) Orbiting Moon
C) Sound waves
D) Tides
Answer: C) Sound waves
Q44. Tides in oceans are mainly caused by:
A) Wind
B) Moon’s gravity
C) Earthquake
D) Rainfall
Answer: B) Moon’s gravity
Q45. Escape velocity is the minimum velocity required to:
A) Stop a body
B) Reach the Moon
C) Escape Earth’s gravity
D) Increase mass
Answer: C) Escape Earth’s gravity
Q46. Gravitational force acts along:
A) Tangent
B) Radius
C) Line joining centers of masses
D) Perpendicular line
Answer: C) Line joining centers of masses
Q47. The shape of planets is nearly spherical because of:
A) Friction
B) Magnetism
C) Gravity
D) Temperature
Answer: C) Gravity
Q48. The acceleration due to gravity decreases with:
A) Increase in height
B) Increase in mass
C) Increase in density
D) Increase in temperature
Answer: A) Increase in height
Q49. Which force is responsible for free fall?
A) Electric force
B) Friction
C) Gravitational force
D) Magnetic force
Answer: C) Gravitational force
Q50. The Moon revolves around Earth because of:
A) Centrifugal force only
B) Gravitational attraction
C) Magnetic force
D) Nuclear force
Answer: B) Gravitational attraction
Q51. Weight of a 25 kg body on Earth is:
A) 98 N
B) 245 N
C) 250 N
D) 25 N
Answer: B) 245 N
Q52. A body weighing 196 N has a mass of:
A) 10 kg
B) 15 kg
C) 20 kg
D) 25 kg
Answer: C) 20 kg
Q53. If the distance between two masses becomes four times, the force becomes:
A) 1/4
B) 1/8
C) 1/16
D) 4 times
Answer: C) 1/16
Q54. Weight of a 40 kg person on Earth is approximately:
A) 392 N
B) 98 N
C) 400 N
D) 40 N
Answer: A) 392 N
Q55. A body weighing 588 N has a mass of:
A) 50 kg
B) 60 kg
C) 70 kg
D) 80 kg
Answer: B) 60 kg
Q56. Weight of a 6 kg object is:
A) 58.8 N
B) 60 N
C) 49 N
D) 6 N
Answer: A) 58.8 N
Q57. If one mass is doubled and the other remains unchanged, gravitational force becomes:
A) Half
B) Double
C) Four times
D) Unchanged
Answer: B) Double
Q58. Weight of a 100 kg body on Earth is:
A) 980 N
B) 100 N
C) 900 N
D) 98 N
Answer: A) 980 N
Q59. Weight of a body of mass 8 kg is:
A) 80 N
B) 78.4 N
C) 98 N
D) 8 N
Answer: B) 78.4 N
Q60. A body weighing 49 N has a mass of:
A) 4 kg
B) 5 kg
C) 6 kg
D) 7 kg
Answer: B) 5 kg
Theoretical MCQs
Q61. Gravity was explained mathematically by:
A) Einstein
B) Newton
C) Galileo
D) Maxwell
Answer: B) Newton
Q62. Which of the following has maximum gravity?
A) Moon
B) Mars
C) Earth
D) Jupiter
Answer: D) Jupiter
Q63. Which quantity depends upon location?
A) Mass
B) Density
C) Weight
D) Volume
Answer: C) Weight
Q64. Gravity of the Moon is approximately:
A) 1/2 of Earth
B) 1/4 of Earth
C) 1/6 of Earth
D) Equal to Earth
Answer: C) 1/6 of Earth
Q65. Which instrument measures weight?
A) Beam balance
B) Measuring cylinder
C) Spring balance
D) Barometer
Answer: C) Spring balance
Q66. The value of g is maximum at:
A) Equator
B) Poles
C) Center of Earth
D) Atmosphere
Answer: B) Poles
Q67. Which force keeps us attached to Earth?
A) Magnetic force
B) Electrostatic force
C) Gravitational force
D) Nuclear force
Answer: C) Gravitational force
Q68. The shape of raindrops falling from clouds is due to:
A) Gravity and surface tension
B) Pressure only
C) Friction only
D) Magnetism
Answer: A) Gravity and surface tension
Q69. Which quantity is measured in Newton?
A) Mass
B) Weight
C) Density
D) Volume
Answer: B) Weight
Q70. Which of the following is a scalar quantity?
A) Weight
B) Force
C) Momentum
D) Mass
Answer: D) Mass
Formula and Conceptual MCQs
Q71. The formula W = mg gives:
A) Mass
B) Weight
C) Density
D) Pressure
Answer: B) Weight
Q72. The value of g on the Moon is approximately:
A) 9.8 m/s²
B) 4.9 m/s²
C) 1.63 m/s²
D) 0 m/s²
Answer: C) 1.63 m/s²
Q73. A 12 kg body on Moon weighs approximately:
A) 117.6 N
B) 19.6 N
C) 60 N
D) 12 N
Answer: B) 19.6 N
Q74. Weight of a 70 kg person on Moon is nearly:
A) 114 N
B) 686 N
C) 700 N
D) 70 N
Answer: A) 114 N
Q75. If both masses are tripled, force becomes:
A) 3 times
B) 6 times
C) 9 times
D) 27 times
Answer: C) 9 times
Q76. If distance is reduced to half, force becomes:
A) Half
B) Double
C) Four times
D) Eight times
Answer: C) Four times
Q77. Weight of a 3 kg object is:
A) 29.4 N
B) 30 N
C) 9.8 N
D) 3 N
Answer: A) 29.4 N
Q78. The SI unit of G contains:
A) kg⁻²
B) kg²
C) m²/s
D) kg/m²
Answer: A) kg⁻²
Q79. A 2 kg body on Moon weighs approximately:
A) 3.3 N
B) 19.6 N
C) 9.8 N
D) 2 N
Answer: A) 3.3 N
Q80. Weight of a 9 kg object on Earth is:
A) 88.2 N
B) 90 N
C) 98 N
D) 9 N
Answer: A) 88.2 N
Advanced Theoretical MCQs
Q81. Which celestial body causes tides on Earth mainly?
A) Sun
B) Venus
C) Moon
D) Mars
Answer: C) Moon
Q82. At which place is weight zero?
A) Earth’s surface
B) Moon’s surface
C) Center of Earth
D) North Pole
Answer: C) Center of Earth
Q83. The force of gravitation is strongest when bodies are:
A) Far apart
B) Very close
C) Massless
D) In vacuum only
Answer: B) Very close
Q84. Which quantity remains unchanged on Earth and Moon?
A) Weight
B) g
C) Mass
D) Force
Answer: C) Mass
Q85. Gravitational force is an example of:
A) Contact force
B) Frictional force
C) Non-contact force
D) Muscular force
Answer: C) Non-contact force
Q86. Which of the following depends upon g?
A) Mass
B) Weight
C) Density
D) Volume
Answer: B) Weight
Q87. Which planet has stronger gravity than Earth?
A) Mercury
B) Mars
C) Jupiter
D) Moon
Answer: C) Jupiter
Q88. Gravity decreases with increase in:
A) Mass
B) Height above Earth
C) Density
D) Temperature
Answer: B) Height above Earth
Q89. Artificial satellites revolve around Earth due to:
A) Friction
B) Gravity
C) Magnetism
D) Sound
Answer: B) Gravity
Q90. The Moon does not fall on Earth because:
A) There is no gravity
B) It has sufficient tangential velocity
C) It is very light
D) It is stationary
Answer: B) It has sufficient tangential velocity
Mixed MCQs
Q91. Which force acts between the Sun and planets?
A) Electrostatic force
B) Magnetic force
C) Gravitational force
D) Frictional force
Answer: C) Gravitational force
Q92. The weight of an object is directed:
A) Upward
B) Horizontally
C) Toward the center of Earth
D) Away from Earth
Answer: C) Toward the center of Earth
Q93. Gravity on Earth is produced due to:
A) Rotation of Earth
B) Mass of Earth
C) Magnetic field
D) Atmosphere
Answer: B) Mass of Earth
Q94. The acceleration due to gravity is represented by:
A) G
B) g
C) W
D) F
Answer: B) g
Q95. Weight is directly proportional to:
A) Radius
B) Volume
C) Mass
D) Distance
Answer: C) Mass
Q96. Which quantity has the same value throughout the universe?
A) g
B) Weight
C) G
D) Density
Answer: C) G
Q97. The gravitational force between Earth and an object is called:
A) Pressure
B) Weight
C) Density
D) Momentum
Answer: B) Weight
Q98. A freely falling body accelerates due to:
A) Friction
B) Magnetic field
C) Gravity
D) Pressure
Answer: C) Gravity
Q99. Which law explains planetary motion due to gravity?
A) Newton’s Law of Gravitation
B) Ohm’s Law
C) Boyle’s Law
D) Hooke’s Law
Answer: A) Newton’s Law of Gravitation
Q100. Gravity is essential for:
A) Keeping atmosphere around Earth
B) Producing sound only
C) Electricity generation only
D) Magnetism only
Answer: A) Keeping atmosphere around Earth