Mechanics RRB PYQ – Physics Previous Year Questions
Practice Mechanics 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 Physics question set covers important concepts related to work, power, energy, mass, force, Newton’s laws of motion, momentum, distance, displacement, speed, velocity, acceleration, equations of motion, friction and motion, helping you revise essential Physics concepts for RRB examinations.
Each question includes the correct answer and an explanation to help you understand the concept, strengthen your Physics fundamentals, and revise important Mechanics topics for RRB Railway examinations.
Start practicing Mechanics RRB PYQs and strengthen your Physics preparation.
461
In which activity is potential energy converted into kinetic energy?
RRB ALP & Technician
31/08/2018 / Shift-III
2018
✓ Answer:DA pendulum swinging
As a pendulum moves downward, gravitational potential energy becomes kinetic energy.
462
A 15 kg object is 10 m above the ground. Find its energy. (g = 10 m/s²)
RRB Group D
31/10/2018 / Shift-III
2018
✓ Answer:D1500 J
U = 15 × 10 × 10 = 1500 J.
463
A house consumes 900 × 10⁶ J of energy in a month. How many electrical units is this?
RRB Group D
26/11/2018 / Shift-III
2018
✓ Answer:D250
1 unit = 1 kWh = 3.6 × 10⁶ J. Units = 900/3.6 = 250.
464
If an object's momentum triples while its mass remains constant, its kinetic energy:
RRB ALP & Technician
31/08/2018 / Shift-II
2018
✓ Answer:CBecomes nine times the original
K = p²/(2m), so tripling p multiplies K by 3² = 9.
465
A 15 kg object has kinetic energy of 120 J. Find its velocity.
RRB Group D
09/10/2018 / Shift-II
2018
✓ Answer:B4 m/s
v = √(2K/m) = √(240/15) = 4 m/s.
466
A uniform 2 m chain of mass 4 kg lies on a table with 60 cm hanging over its edge. Find the work needed to pull the whole chain onto the table.
RRB Group D
07/12/2018 / Shift-I
2018
✓ Answer:C3.6 J
Hanging mass = (4/2) × 0.6 = 1.2 kg. Its centre rises 0.3 m. W = 1.2 × 10 × 0.3 = 3.6 J.
467
What energy does a raised hammer have?
RRB ALP & Technician
09/08/2018 / Shift-III
2018
✓ Answer:DPotential energy
A raised hammer has gravitational potential energy because of its height.
468
Find the kinetic energy of a 15 kg object moving at 8 m/s.
RRB Group D
09/10/2018 / Shift-II
2018
✓ Answer:A480 J
K = (1/2) × 15 × 8² = 480 J.
469
Particles in which state have the greatest kinetic energy in the comparison used here?
RRB Group D; RRB Group D
26/10/2018 / Shift-III; 12/11/2018 / Shift-III
2018
✓ Answer:DGas
The PDF keys gases in its elementary comparison of states. Actual mean particle kinetic energy depends on temperature.
470
If an object's velocity doubles, its kinetic energy becomes n times the original. Find n.
RRB ALP & Technician
13/08/2018 / Shift-II
2018
✓ Answer:B4
K ∝ v², so n = 2² = 4.
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