Practice Work, Power and Energy 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, kinetic energy, potential energy, mechanical energy and the conservation of energy.
The Work, Power and Energy RRB PYQ collection is useful for candidates preparing for Railway examinations and revising important Physics concepts through previous year questions. Questions from this topic can include both conceptual and numerical problems, making regular practice important for improving calculation accuracy and understanding the application of Physics formulas.
Whether you are preparing for RRB NTPC Work, Power and Energy PYQ, RRB Group D Work, Power and Energy PYQ, RRB JE Work, Power and Energy PYQ, RRB ALP Work, Power and Energy PYQ, or RRB Technician Work, Power and Energy PYQ, practice these previous year questions regularly as part of your Railway Physics preparation.
Start practicing Work, Power and Energy RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
231
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.
232
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.
233
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.
234
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.
235
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.
236
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.
237
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.
238
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.
239
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.
240
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.
Showing 231 – 240 of 298 MCQ Questions | Page 24 of 30
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