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.
321
If an object's displacement is zero, work done by the applied force is:
RRB Group D
16/11/2018 / Shift-I
2018
✓ Answer:DZero
W = Fs cos θ = 0 when s = 0.
322
Efficiency of work is known as:
RRB Group D
16/11/2018 / Shift-II
2018
✓ Answer:AEnergy
The PDF keys energy and explains the ability to do work. Its question uses 'efficiency', which is imprecise; efficiency is normally the ratio of useful output to input.
323
Two conditions must be fulfilled for work to be done. Which is one of them?
RRB Group D
24/10/2018 / Shift-III
2018
✓ Answer:BThe object must be displaced.
Mechanical work requires an applied force and displacement with a component along it.
324
Work done is zero when which quantity is zero?
RRB Group D
11/10/2018 / Shift-I
2018
✓ Answer:BDisplacement
Zero displacement gives zero mechanical work.
325
If work done is zero, what is the angle between a nonzero force and nonzero displacement?
RRB Group D; RRB Group D
08/10/2018 / Shift-II; 17/09/2018 / Shift-II
2018
✓ Answer:B90°
W = Fs cos θ = 0 implies cos θ = 0, so θ = 90°.
326
The product of force and displacement in its direction is called:
RRB Group D
19/09/2018 / Shift-I
2018
✓ Answer:CWork
Work is the scalar product of force and displacement.
327
Which is not a characteristic of work?
RRB Group D
16/11/2018 / Shift-III
2018
✓ Answer:AWork has a direction.
Work is a scalar quantity and has no direction.
328
A force of 20 N moves a body 4 metres in the force direction. Find the work done.
RRB Group D
05/10/2018 / Shift-II
2018
✓ Answer:D80 J
W = Fs = 20 × 4 = 80 J.
329
Work is the product of:
RRB Group D
08/08/2018 / Shift-I
2018
✓ Answer:CForce and displacement in the force direction
W = Fs for displacement along the force.
330
A bus experiences a force of 4000 N and the work done is 2000 J. Find the distance covered.
RRB Group D
06/12/2018 / Shift-III
2018
✓ Answer:D0.5 m
s = W/F = 2000/4000 = 0.5 m.
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