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.
61
What minimum energy is required to launch a satellite of mass m from Earth's surface into a circular orbit at altitude 2R, where Earth's radius is R?
RRB Group-D
02/11/2018 / Shift II
2018
✓ Answer:D5mgR/6
Initial energy is -GMm/R and final orbital energy is -GMm/(6R). The increase is 5GMm/(6R) = 5mgR/6, neglecting Earth's rotation and losses.
62
A body weighs 3 N on the Moon. What is its weight on Earth?
RRB Technicians Grade-III
26/12/2024 / Shift III
2024
✓ Answer:D18 N
Earth weight is approximately six times lunar weight: 6 × 3 = 18 N.
63
Which statement is incorrect?
RRB Group-D
02/11/2018 / Shift I
2018
✓ Answer:BAn object's weight is minimum at the poles and maximum at the equator
Effective surface gravity is greater at the poles than at the equator, so statement B reverses the relationship.
64
When a body falls freely under gravity, which quantity does not remain constant?
RRB Technicians Grade-III
28/12/2024 / Shift II
2024
✓ Answer:ADistance
The distance travelled increases during the fall. Near Earth's surface, g is treated as constant.
65
If the separation between two objects becomes six times its original value, their gravitational force becomes:
RRB Group-D
16/11/2018 / Shift II
2018
✓ Answer:C1/36 times
F' = F/6² = F/36. The source's phrase 'exceeds ... by 6 times' is interpreted as a sixfold separation.
66
When an object is moving upward after being thrown, the gravitational force is:
RRB Technicians Grade-III
28/12/2024 / Shift II
2024
✓ Answer:BOpposite to its direction of motion
Gravity acts downward, opposing the upward motion. Its direction is set by Earth's attraction, regardless of velocity; B describes the particular upward-moving case.
67
What is the force of attraction between any two physical objects called?
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