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 2 of 14
- A. The earth does zero work on the satellite.
- B. The earth does positive work on the satellite.
- C. The earth does negative work on the satellite.
- D. The concept of work is not applicable in circular motion.
Explanation: The explanation for this question has been added!
Correct answer: The earth does zero work on the satellite.- A. More the mass of a body connected with spring balance, more will be the elongation in the spring balance.
- B. More the mass of body kept in one pan of beam balance, more the mass has to be kept on the other pan to keep beam horizontal.
- C. More the mass of a body, lesser will be its acceleration for a given force.
- D. All of the above
Explanation: This is the following solution: Consider the situation in gravity-free space.
Correct answer: More the mass of a body, lesser will be its acceleration for a given force.- A. Continue to move in its orbit with the same velocity
- B. Move tangentially to the original orbit in the same velocity.
- C. Become stationary in its orbit.
- D. Move towards the earth.
Explanation: This is the following solution: For a body moving around an object, it is bound by the centripetal force of the object on the body.
Correct answer: Move tangentially to the original orbit in the same velocity.- A. 1/4 mgR
- B. 1/2 mgR
- C. mgR
- D. 2mgR
Explanation: This is the following solution: The correct option is mgR: The kinetic energy needed to project a body of mass m from the Earth's surface…
Correct answer: mgR- A. Mass of the earth
- B. Mass of the projectile
- C. Radius of the projectile's orbit
- D. Gravitational constant
Explanation: This is the following solution: The correct option is the mass of the projectile: The escape velocity is solely determined by the mass of…
Correct answer: Mass of the projectile- A. Remains same
- B. Increases
- C. Decreases
- D. Increase at N-pole & decreases at S-pole
Explanation: The following is the solution: g′=g−Rω2cos(2λ) g′=g−Rω2cos2λ, where ω is the angular velocity of rotation of Earth about its polar axis…
Correct answer: Increases- A. 6 hours
- B. 12 hours
- C. 48 hours
- D. 96 hours
Explanation: This is the following solution: T ∝ (1/2)2 T= 24 hours T= 24/ 4= 6 hours
Correct answer: 6 hours- A. Doubled: This option is not correct. When the distance between two masses is doubled, the gravitational attraction between them does not double. In fact, it decreases.
- B. Increases four times
- C. Reduced to half
- D. Reduced to a quarter
Explanation: This is the following solution: Reduced to a quarter: This is the correct answer.
Correct answer: Reduced to a quarter- A. Maximum
- B. Minimum
- C. Zero
- D. None of the above
Explanation: This is the following solution: The earth's radius at poles is the least, so acceleration due to gravity will be highest at poles because…
Correct answer: Maximum- A. Increase
- B. Decrease
- C. Remain unchanged
- D. Sometimes decrease and sometimes increase
Explanation: The following is the solution: Decrease: This is the correct answer. As mentioned above, an increase in the speed of Earth's rotation…
Correct answer: Decrease- A. (a) and (c) are correct.
- B. (b) and (c) are correct.
- C. (a) and (d) are correct.
- D. (b) and (d) are correct.
Explanation: The following is the solution: B's statement is correct. In an isolated system, where no external forces are acting, the total energy of…
Correct answer: (b) and (d) are correct.- A. 108J
- B. 1016 J
- C. 1020 J
- D. 1024 J
Explanation: The following is the solution: Kinetic energy = 1/2 mvo2 = 1/2 x 2 (104)2 = 108 J
Correct answer: 108J- A. Zero
- B. Infinite
- C. Same as on the surface
- D. None of these
Explanation: The following is the solution: Because g at the center of the Earth is zero So weight = mg is also zero.
Correct answer: Zero- A. Increases
- B. Decreases
- C. Remains the same
- D. Increases then decreases
Explanation: This is the following solution: From the equation: g'=g - ω2 Re cos2λ Where λ is the latitude which is 0° at the equator and 90° at the…
Correct answer: Increases- A. Is directly proportional to g
- B. Is inversely proportional to g
- C. Does not depend on g
- D. Is a complex function of g
Explanation: The following is the solution: The gravitational constant g is given as: g=GM/R2 Density D=mass/volume =g×R2/G×Ve (Where Ve is the volume…
Correct answer: Is directly proportional to g- A. v0
- B. v0/√ 2
- C. Zero
- D. V0/2
Explanation: This is the following solution: The motion of the particle within the tunnel is simple harmonic.
Correct answer: v0/√ 2- A. Masses
- B. Volumes
- C. Weights
- D. Surface areas
Explanation: According to Newton's law of universal gravitation, the force of gravitation between two objects is directly proportional to the product…
Correct answer: Masses- A. Distance between
- B. Square of the distance between
- C. Product of the masses
- D. None of the above
Explanation: According to Newton's law of universal gravitation, the force of gravitation between two objects is directly proportional to the product…
Correct answer: Square of the distance between- A. Fictitious force
- B. Universal force
- C. Pair of action and reaction forces
- D. Dragging force
Explanation: Gravitational force is a fundamental force of nature that acts universally between all objects with mass.
Correct answer: Universal force- A. Cavendish
- B. Newton
- C. Michelson
- D. Watt
Explanation: The value of the gravitational constant G was determined by the physicist Henry Cavendish through his famous Cavendish experiment, which…
Correct answer: Cavendish