Free Gravitation MCQs with Answers

• A. mg
• B. mg+ma
• C. mg - ma
• D. mg/2

Explanation: As the escalator is moving upwards, the correct expression for apparent weight can be written as W' = m x (g + a)Hence the correct option…

• A. Remain same
• B. Become four times
• C. Increase four times
• D. Become one fourth

Explanation: F=GMm/R2 When the distance is doubled, F'= GMm/4R2On comparing both the forces their ratio is equal to F'/F= 1/4Hence the correct option…

• A. Halved
• B. Doubled
• C. Four times
• D. Same

Explanation: F=GMm/R2 When the distance is halved, F'= GMm/0.25R2 On comparing both the forces their ratio is equal to F'/F= 4/1Hence, the correct…

• A. Product of their masses
• B. Square of the distance between them
• C. Square of the distance between their centers
• D. Product of mass & distance between them

Explanation: F=GMm/R2 According to the formula, it is inversely proportional to the square of the separation of two bodies from their centers.

• A. Impulsive
• B. Reactive
• C. Repulsive
• D. Attractive

Explanation: D is correct. It is a matter of fact that Gravitational force is always an attractive force between two bodies.

• A. Product of mass and distance between them
• B. Square of the distance between them
• C. Product of their masses
• D. Product of square of their masses

Explanation: C is correct. The force of attraction between two bodies is directly proportional to the products of their masses only. As, F= GMm/R2 .

• A. Nuclear force
• B. Gravitational force
• C. Electrostatic force
• D. Electromagnetic force

Explanation: A is correct. Gravitational force is the only force that is responsible for the motion of falling bodies and the motion of planets around…

• A. Attractive force
• B. Repulsive force
• C. Negative force
• D. None of these

Explanation: A is correct. -ve sign always shows attractive force.

• A. 6 x 10^24 kg
• B. 1.6 x 10^-30 kg
• C. 1.6 x 10^-31 kg
• D. None of the above

Explanation: A is correct. It is a fact that Earth's mass is 6 x1024 kg.

• A. Torque
• B. Density
• C. Viscosity
• D. None of these

Explanation: B is correct. Mass per unit volume is density.

• A. 5462 kgm-3
• B. 5462 gm-3
• C. 5462 kgm3
• D. None of these

Explanation: A is correct. It is a fact that the mean density of Earth is approximately 5.5 x 103 kgm-3 .

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: B is correct as per the derived formula. g= GM/R2 .

• A. Option A
• B. Option B
• C. Option C
• D. Option D

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

• A. 6400 m
• B. 6400 km
• C. 6400 cm
• D. 6400 dm

Explanation: B is correct. It is a fact that the radius of the Earth is 6400 km.

• A. Mass
• B. Inertial mass
• C. Gravitational mass
• D. None of the above

Explanation: B is correct. Inertia is the measure of the reluctance of an object to change its state of motion when force is applied according to the…

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: A is the correct option as per the derived formula.

• A. Two times
• B. Three times
• C. Six times
• D. Nine times

Explanation: D is correct. g= GM/r 2 , as the distance is increased from R to 3R so g' will be =GM/9r2 As a result g' will be 9 times less than g.

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: C is correct as per the derived formula, formed by using centripetal acceleration.

• A. Rest
• B. Static equilibrium
• C. Dynamic equilibrium
• D. Weightlessness

Explanation: Dis correct. Freely falling bodies are already accelerating at a 9.81 m/s2 so experience no additional force by Earth and hence feel…

• A. Weightlessness
• B. Artificial gravity
• C. Vacuum
• D. None of the above

Explanation: B is correct. By spinning the spaceship around its own axis with a certain frequency which can provide centripetal force equal to the…