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 4 of 14
- A. Is also doubled
- B. Remains the same
- C. Becomes one half
- D. Become a quarter of the original value
Explanation: Correct Answer: A If the value of universal constant G is doubled, the value of g is also doubled.
Correct answer: Is also doubled- A. Increased
- B. Decreased
- C. Remained constant
- D. None of the above
Explanation: If the mass of a body moves toward the axis of rotation, the moment of inertia of the body decreases.
Correct answer: Decreased- A. Gravitation
- B. Weak
- C. Strong
- D. None of these
Explanation: The gravitational force is responsible for the motion of planets around the Sun.
Correct answer: Gravitation64. According to Newton's law of gravitation, force is_ _ proportional to the product of their masses:
- A. Directly
- B. Universal
- C. Inversely
- D. None of these
Explanation: According to Newton's law of gravitation, force is directly proportional to the product of the masses of two objects.
Correct answer: Directly- A. Directly
- B. Inversely
- C. Gravitation
- D. None of these
Explanation: The force between two objects is inversely proportional to the square of the distance between their centers of mass.
Correct answer: Inversely- A. Gravitation of the earth
- B. Universal gravitational constant
- C. Gravitational distance
- D. None of these
Explanation: "G" in the equation for the gravitational force is known as the gravitational constant.
Correct answer: Universal gravitational constant- A. 4.49 x 10^12 Nm
- B. 6.67 x 10^-9 Nm
- C. 6.67 x 10^-11 Nm2/kg2
- D. 6.67 x 10^-6 Nm2/kg2
Explanation: "G" in the equation for the gravitational force is known as the gravitational constant.
Correct answer: 6.67 x 10^-11 Nm2/kg2- A. Normal and general
- B. Positive and negative
- C. Negative and positive
- D. Action and reaction
Explanation: Newton's third law of motion states that for every action, there is an equal and opposite reaction.
Correct answer: Action and reaction- A. Action
- B. Reaction
- C. Opposite
- D. None of these
Explanation: Newton's third law of motion states that for every action, there is an equal and opposite reaction.
Correct answer: Opposite- A. R
- B. G
- C. -R
- D. R2
Explanation: Henry Cavendish used his method to determine the density of the Earth and, from there, to calculate the gravitational constant ( G ).
Correct answer: G- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Correct Answer: Option B Option A is incorrect as the formula is being used to find the value of Gravitational force instead of…
Correct answer: Option B- A. 6.4 x 10^6 m
- B. 6.4 x 10^3 m
- C. 64.5 x 10^3 m
- D. 64.5 x 10^6 m
Explanation: This is a fact. The radius of the earth is 6400km or 6.4 x 103m . Therefore the correct option is option A.
Correct answer: 6.4 x 10^6 m- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Option A is correct as it gives the correct derived formula for the mass of earth according to Newton's Law of Gravitation.
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Option A is correct since the formula given is mathematically correct. The other options do not correlate (g) with altitude.
Correct answer: Option A- A. 49.7 m/s2
- B. 9.8 m/s2
- C. 8.9 m/s2
- D. 47.3 m/s2
Explanation: Option B is correct. The value of g at the surface of the eath is 9.8m/s2
Correct answer: 9.8 m/s2- A. Less
- B. Greater
- C. Same
- D. Equal
Explanation: The value of gravitational acceleration ( g ) varies with altitude. Near the surface of the Earth, the standard average value for ( g ) is…
Correct answer: Less- A. Greater
- B. Decreases
- C. Increases
- D. Zero
Explanation: At the center of the Earth, the gravitational acceleration ( g ) theoretically becomes zero.
Correct answer: Zero- A. Mass
- B. Weight
- C. Gravity
- D. None of these
Explanation: In a reference frame where acceleration (a) is zero, an object is either at rest or moving at a constant velocity.
Correct answer: Gravity- A. Centripetal
- B. Artificial
- C. Mass
- D. None of these
Explanation: When a satellite moves in a circular orbit around the Earth, the necessary centripetal force is provided by the force of gravity.
Correct answer: Centripetal- A. Also doubles
- B. Remains same
- C. Four times
- D. Two times
Explanation: The value of the gravitational constant (G) is not affected by changes in the mass of the Earth or any other celestial body.
Correct answer: Remains same