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.
521
Find the kinetic energy of a 10 kg object moving at 5 m/s.
RRB Group D; RRB Group D
10/10/2018 / Shift-I; 19/09/2018 / Shift-I
2018
✓ Answer:A125 J
K = (1/2) × 10 × 5² = 125 J.
522
Find the energy of a 50 kg body at a height of 6 m.
RRB Group D
22/09/2018 / Shift-III
2018
✓ Answer:A3000 J
Using g = 10 m/s², U = 50 × 10 × 6 = 3000 J.
523
Which energy has two forms, kinetic and potential?
RRB Group D
01/10/2018 / Shift-I
2018
✓ Answer:AMechanical
Mechanical energy consists of kinetic and potential energy.
524
A 2 kg object has kinetic energy of 400 J just before hitting the ground. From what height was it dropped?
RRB Group D
04/12/2018 / Shift-II
2018
✓ Answer:C20 m
Using g = 10 m/s² and energy conservation, mgh = 400, so h = 400/(2 × 10) = 20 m.
525
Find the potential energy of a mass m raised from ground level to a height of 4h.
RRB Group D
16/10/2018 / Shift-II
2018
✓ Answer:A4mgh
U = mg(4h) = 4mgh.
526
A 15 kg object moves uniformly at 7 m/s. Find its kinetic energy.
RRB Group D
08/10/2018 / Shift-III
2018
✓ Answer:C367.5 J
K = (1/2) × 15 × 7² = 367.5 J.
527
Which contains potential energy?
RRB Group D
30/10/2018 / Shift-II
2018
✓ Answer:AWater stored in a dam
The PDF keys stored dam water, whose elevation gives gravitational potential energy.
528
An 11 kg object is placed 7 m above the ground. How much energy does it have?
RRB Group D
22/10/2018 / Shift-II
2018
✓ Answer:D754.6 J
Using g = 9.8 m/s², U = 11 × 9.8 × 7 = 754.6 J.
529
A 12 kg object has potential energy of 600 J at a height above the ground. Find the height. (g = 10 m/s²)
RRB Group D
04/10/2018 / Shift-I
2018
✓ Answer:D5 m
h = U/(mg) = 600/(12 × 10) = 5 m.
530
Which object is identified by its potential energy?
RRB Group D
03/10/2018 / Shift-II
2018
✓ Answer:DA raised hammer
The raised hammer stores gravitational potential energy.
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