Practice Force and Laws of Motion 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 force, Newton’s laws of motion, inertia, acceleration, momentum and the effect of force on the motion of objects.
The Force and Laws of Motion 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, helping you understand the application of Newton’s laws and improve your problem-solving skills.
Whether you are preparing for RRB NTPC Force and Laws of Motion PYQ, RRB Group D Force and Laws of Motion PYQ, RRB JE Force and Laws of Motion PYQ, RRB ALP Force and Laws of Motion PYQ, or RRB Technician Force and Laws of Motion PYQ, practice these questions regularly to strengthen your Railway Physics preparation.
131
Rockets work on the principle of conservation of ______.
RRB NTPC (Stage-I)
31/01/2021 / Shift-I
2021
✓ Answer:AMomentum
Expelling gases backward gives the rocket forward momentum while total momentum is conserved in an isolated system.
132
What is the momentum of an object of mass m/2 moving with velocity 2v?
RRB Group D
24/09/2018 / Shift-I
2018
✓ Answer:Bmv
p = (m/2)(2v) = mv.
133
What happens when two bodies undergo an inelastic collision in an isolated system?
RRB Group D
16/11/2018 / Shift-I
2018
✓ Answer:BKinetic energy changes, but momentum is conserved.
Total momentum is conserved, while some kinetic energy is converted into other forms.
134
An 80 kg object moves at 60 m/s. Find its momentum.
RRB Group D
22/09/2018 / Shift-II
2018
✓ Answer:B4800 kg·m/s
p = mv = 80 × 60 = 4800 kg·m/s.
135
A 0.5 kg cube moves at 2.0 m/s on a smooth surface and collides with a stationary 1.0 kg object. They stick together. Find the energy lost.
RRB Group D
10/12/2018 / Shift-III
2018
✓ Answer:C0.67 J
Their common speed is (0.5 × 2)/1.5 = 2/3 m/s. Energy lost = 1 − (1/2)(1.5)(2/3)² = 2/3 J ≈ 0.67 J.
136
A 50 kg object moves at a constant velocity of 6 m/s. Find its momentum.
RRB Group D
02/11/2018 / Shift-I
2018
✓ Answer:B300 kg·m/s
p = mv = 50 × 6 = 300 kg·m/s.
137
In a collision, which quantity is conserved?
RRB Group D
05/12/2018 / Shift-I
2018
✓ Answer:CMomentum
Total momentum is conserved when the net external impulse is zero.
138
Which statement most appropriately describes the factors affecting the momentum of a moving object?
RRB Group D
01/12/2018 / Shift-II
2018
✓ Answer:BIt depends on mass and velocity.
Since p = mv, momentum depends on both mass and velocity.
139
Rocket flight can be understood using which law?
RRB Group D
12/11/2018 / Shift-II
2018
✓ Answer:BConservation of momentum
The backward momentum of exhaust gases is balanced by forward momentum of the rocket.
140
If an object's velocity is doubled, what happens to its momentum and kinetic energy?
RRB Group D; RRB Group D
05/11/2018 / Shift-I; 26/11/2018 / Shift-III
2018
✓ Answer:CMomentum becomes 2 times and kinetic energy 4 times.
Momentum is proportional to v, while kinetic energy is proportional to v².
Showing 131 – 140 of 267 MCQ Questions | Page 14 of 27
Start practicing Force and Laws of Motion RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
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