Free Gravitation MCQs with Answers

• A. Atom round the nucleus
• B. Motor car on the road
• C. A body round the axes
• D. Planet around the sun

Explanation: The gravitational force Fg is responsible for the motion of planets around the Sun.

• A. Kepler's law
• B. The Cavendish experiment
• C. Newton's second law of motion
• D. Universal law of gravitation

Explanation: The universal law of gravitation, proposed by Sir Isaac Newton, states that every particle of matter in the universe attracts every other…

• A. Weight lessening
• B. Dynamic equilibrium
• C. Static equilibrium
• D. Rest

Explanation: B is the correct answer. Dynamic equilibrium occurs when an object is in motion with a constant velocity.

• A. Pascal
• B. Boyle
• C. Huygen
• D. Newton

Explanation: Sir Isaac Newton, an English mathematician and physicist, introduced the law of universal gravitation in his work "Philosophiæ Naturalis…

• A. Increased in weight
• B. Decreased in weight
• C. Some time increase & some time decrease
• D. Have no change in weight

Explanation: D is the correct option. The weight of an object is determined by the gravitational force acting on it, which depends on the mass of the…

• A. Inertia
• B. Acceleration
• C. Zero gravity
• D. Centre of gravity

Explanation: Weightlessness is often colloquially referred to as "zero gravity,". The correct term is microgravity.

• A. Now follow an irregular path
• B. Fall to the Earth
• C. Continue to move with satellite
• D. Follow a parabolic path

Explanation: Option C means that when the spoon is released from the satellite, it will continue to travel at the same velocity it had before, along…

• A. Four forces
• B. Three forces
• C. Two forces
• D. One force

Explanation: In some situations, we may simplify the analysis to consider only two forces: gravity and the normal force.

• A. It is lighter than air
• B. Of gravitational pull of Earth
• C. It has a fan, which displaces more air per unit time then, the weight of rocket
• D. Of the force exerted on the rocket by gases ejected by it

Explanation: D is the correct answer. Rockets work on the principle of action and reaction (Newton's third law of motion).

• A. Mass of the satellite
• B. The radius of the planet
• C. The mass planet
• D. All of these

Explanation: The time period of a satellite does not depend on the mass of the satellite.

• A. The mass of the body will reduce to zero
• B. The weight of the body will reduce to zero
• C. Both will reduce to zero
• D. It becomes infinity

Explanation: Statement B is correct. Weight is the force with which gravity pulls an object toward the center of the Earth (or any celestial body).

• A. Deviation of the falling bodies towards east
• B. Revolution of the Earth round the Sun
• C. Phenomenon of day and night
• D. Apparent motion of Sun round the Earth

Explanation: Option B is a key piece of evidence. The fact that Earth revolves around the Sun is a result of gravitational attraction between the Earth…

• A. Decrease
• B. Remain unchanged
• C. Increase
• D. None of these

Explanation: Option c is correct. As explained earlier, a 1% decrease in the radius leads to an increase in the gravitational acceleration at the…

• A. The angular speed remains constant
• B. The total angular momentum remains constant
• C. The linear speed remains constant
• D. Neither the angular momentum nor angular speed remains constant

Explanation: Statement B is close to being true. According to Kepler's laws, the total angular momentum of a planet remains constant during its motion…

• A. The mass the object
• B. The direction of projection
• C. The mass of the planet
• D. Radius of the planet

Explanation: The escape velocity is independent of the mass of the object. This is a fundamental principle based on the conservation of energy.

• A. Earth attracts every body nearly towards its centre
• B. Their weight is zero
• C. Their weight is infinite
• D. The value of g is zero in the Southern Hemisphere

Explanation: This option is correct. The force of gravity acts toward the center of the Earth.

• A. It is always attractive
• B. It acts on all heavenly bodies and particles
• C. It acts on all the masses at all the distances and is not affected by the medium
• D. All of the above

Explanation: The correct answer is "All of the above" because options (a), (b), and (c) are all accurate descriptions of why Newton's law of…

• A. Remains the same
• B. Decreases
• C. Increases
• D. Decreases upto latitude of 45o

Explanation: The Explanation for this question will be added soon!

• A. Force of gravitation
• B. Constant of gravitation
• C. Gravitational acceleration
• D. Gravitational attraction

Explanation: The Explanation for this question will be added soon!

• A. Increased
• B. Decreased
• C. Kept the same
• D. Nothing can be said

Explanation: The Explanation for this question will be added soon!