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.
291
An 11 kg object moves at 5 m/s. Find its kinetic energy.
RRB Group D
10/10/2018 / Shift-II
2018
✓ Answer:B137.5 J
K = (1/2) × 11 × 5² = 137.5 J.
292
Find the kinetic energy of a 2 kg ball moving at 30 m/s.
RRB Group D
04/10/2018 / Shift-II
2018
✓ Answer:B900 J
K = (1/2) × 2 × 30² = 900 J.
293
A 15 kg object moves uniformly at 5 m/s. Find its kinetic energy.
RRB Group D
08/10/2018 / Shift-II
2018
✓ Answer:A187.5 J
K = (1/2) × 15 × 5² = 187.5 J.
294
A 12 kg object has potential energy of 600 J. Find its height above the ground.
RRB Group D
22/10/2018 / Shift-I
2018
✓ Answer:C5 m
Using g = 10 m/s², h = 600/(12 × 10) = 5 m.
295
A 12 kg object has potential energy of 480 J. Find its height above the ground.
RRB Group D
03/10/2018 / Shift-II
2018
✓ Answer:C4 m
Using g = 10 m/s², h = U/(mg) = 480/(12 × 10) = 4 m.
296
Which energy increases with speed?
RRB Group D
24/10/2018 / Shift-I
2018
✓ Answer:CKinetic energy
K = (1/2)mv² increases with the square of speed for fixed mass.
297
Which are examples of potential energy? A. Bricks on a roof. B. A wound clock spring. C. A compressed spring. D. Water in an elevated reservoir.
RRB Group D
31/10/2018 / Shift-II
2018
✓ Answer:DA, B, C, and D
Elevation stores gravitational potential energy, while wound or compressed springs store elastic potential energy.
298
What do these examples represent? 1. A fast pebble can injure a person or break glass. 2. A moving vehicle has energy. 3. Fast-moving air can damage houses. 4. Wind can drive a windmill.
RRB Group D
24/10/2018 / Shift-I
2018
✓ Answer:AKinetic energy
All examples involve the ability of moving objects or air to do work.
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