Practice Gravitation RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise question set covers important concepts of gravitation that are useful for RRB Physics preparation.
The questions cover important concepts such as Newton’s law of gravitation, gravitational force, acceleration due to gravity, variation of gravity, mass and weight, gravity and motion under gravity, satellite motion, escape velocity and related numerical and conceptual questions.
Gravitation RRB PYQ questions are useful for candidates preparing for Gravitation RRB NTPC PYQ, Gravitation RRB Group D PYQ, Gravitation RRB JE PYQ, Gravitation RRB ALP PYQ and Gravitation RRB Technician PYQ. Solve the questions, check the solutions, and strengthen your understanding of important concepts frequently relevant to Railway exams.
Start practicing Gravitation RRB PYQs and improve your Physics preparation for upcoming Railway examinations.
31
The universal gravitational constant on a planet of mass M is G. What is its value on another planet of mass 4M?
G is a universal constant and does not depend on the planet's mass.
32
If the masses of both objects are tripled, what happens to their gravitational force at unchanged separation?
RRB Group-D
27/11/2018 / Shift I
2018
✓ Answer:CIt becomes nine times as large
F' = G(3m₁)(3m₂)/r² = 9F.
33
Which phenomenon cannot be explained using the universal law of gravitation?
RRB Technicians Grade-III
30/12/2024 / Shift I
2024
✓ Answer:CFiring a bullet from a gun
The propulsion and recoil involved in firing a gun are explained by forces from expanding gases and conservation of momentum, rather than gravitational attraction.
34
Which statements are false? A. G has the same value on Earth and the Moon. B. Two 2 kg masses separated by 1 m attract with a force of 26.68 × 10⁻¹¹ N m²/kg². C. Force is inversely proportional to the square of separation. D. Halving the separation doubles the force.
RRB Group-D
31/10/2018 / Shift I
2018
✓ Answer:COnly D
The source selects only D: halving separation makes the force four times as large. Statement B has the correct numerical force but prints the unit of G instead of N; this source unit error is retained and flagged.
g = GM/R² is independent of the falling object's mass.
36
A body falls from rest and reaches the ground in 2 s. What is its final velocity? Take g = 10 m/s².
RRB Technicians Grade-III
30/12/2024 / Shift I
2024
✓ Answer:A20 m/s
v = gt = 10 × 2 = 20 m/s downward.
37
If gravitational force becomes F/9, how has the separation changed, assuming unchanged masses?
RRB Group-D
10/10/2018 / Shift I
2018
✓ Answer:AIt has tripled
Since F ∝ 1/r², reducing force by nine requires tripling separation.
38
If u, g and h are the initial velocity, gravitational acceleration and downward displacement, which equation gives final velocity v?
RRB Technicians Grade-III
26/12/2024 / Shift II
2024
✓ Answer:Cv² - u² = 2gh
The constant-acceleration equation is v² = u² + 2gh when downward is positive. It is a kinematic equation, not Newton's third law as stated in the source solution.
39
Which is not an example of gravity in the source question?
RRB Group-D
24/10/2018 / Shift II
2018
✓ Answer:BCausing a black hole to rotate
The source selects B. A black hole's rotation reflects its angular momentum; the other options directly describe gravitational binding or orbital motion.
40
Near Earth's surface, gravitational acceleration of an object of mass m is:
RRB Technicians Grade-III
26/12/2024 / Shift II
2024
✓ Answer:CIndependent of m
g = GM/R² is independent of the object's mass.
Showing 31 – 40 of 162 MCQ Questions | Page 4 of 17
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