Mastering the important concepts in Class 11 Physics Chapter 4 – Laws of Motion is essential for scoring high marks in your exams. That’s why we’ve put together chapterwise multiple-choice questions (MCQs) with answers to help you revise effectively and boost your confidence. It is a part of MCQ Questions for CBSE Class 11 Physics Series.
These multiple-choice questions will help you assess your knowledge, improve accuracy, and boost confidence for your exams. Whether you are preparing for school tests, online tests or competitive exams, these Laws of Motion MCQs will strengthen your conceptual clarity.
| Chapter | Laws of Motion |
| Book | Physics for Class 11 |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 11 |
| Subject | Physics |
| Useful for | Class 11 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 11 Physics Chapterwise MCQ Questions |
MCQ Questions on Laws of Motion Class 11 Physics (PDF Download)
MCQs
Q1. A person in a moving bus falls backward when the bus starts suddenly. This is explained by:
(a) Newton’s first law
(b) Newton’s second law
(c) Newton’s third law
(d) Law of conservation of momentum
Show Answer
Answer: (a)
Explanation: Due to inertia of rest, the body tends to remain at rest while the bus moves forward.
Q2. A body of mass 2 kg is moving with a velocity of 5 m/s. Its momentum is:
(a) 10 kg m/s
(b) 7 kg m/s
(c) 0.4 kg m/s
(d) 2.5 kg m/s
Show Answer
Answer: (a)
Explanation: Momentum = mass × velocity = 2 × 5 = 10 kg m/s.
Q3. If a force of 5 N acts on a body of mass 2 kg, the acceleration produced is:
(a) 2.5 m/s²
(b) 5 m/s²
(c) 10 m/s²
(d) 1 m/s²
Show Answer
Answer: (a)
Explanation: a = F/m = 5/2 = 2.5 m/s².
Q4. When a gun is fired, the gun recoils due to:
(a) Newton’s first law
(b) Newton’s second law
(c) Newton’s third law
(d) Conservation of energy
Show Answer
Answer: (c)
Explanation: Action and reaction forces are equal and opposite, as stated in Newton’s third law.
Q5. The momentum of a body is conserved when:
(a) No force acts on it
(b) Only internal forces act
(c) External forces cancel out
(d) All of the above
Show Answer
Answer: (d)
Explanation: Total momentum is conserved in the absence of net external force.
Q6. Inertia of a body depends on its:
(a) Volume
(b) Mass
(c) Density
(d) Shape
Show Answer
Answer: (b)
Explanation: Greater mass implies greater inertia.
Q7. A car is moving in a circular track. The centripetal force is provided by:
(a) Engine
(b) Road
(c) Friction
(d) Weight
Show Answer
Answer: (c)
Explanation: Friction provides the centripetal force on a flat road.
Q8. Which of the following quantities is conserved when a ball hits and rebounds off a wall?
(a) Energy
(b) Momentum
(c) Velocity
(d) Force
Show Answer
Answer: (b)
Explanation: Linear momentum is conserved in absence of external force.
Q9. The force which opposes the motion of a body is:
(a) Normal reaction
(b) Friction
(c) Tension
(d) Impulse
Show Answer
Answer: (b)
Explanation: Friction acts opposite to the direction of motion.
Q10. When a body is in uniform circular motion, its acceleration is:
(a) Tangential
(b) Zero
(c) Directed outward
(d) Directed towards the centre
Show Answer
Answer: (d)
Explanation: Centripetal acceleration always acts towards the centre.
Q11. A block rests on an inclined plane. As the angle increases, it just starts sliding at 30°. The coefficient of static friction is:
(a) 0.5
(b) 0.58
(c) 0.62
(d) 0.70
Show Answer
Answer: (b)
Explanation: µ = tan θ = tan 30° ≈ 0.58.
Q12. A man stands on a weighing machine in a lift which is moving downward with acceleration g. The reading on the machine will be:
(a) Zero
(b) Equal to man’s weight
(c) More than the actual weight
(d) Half the weight
Show Answer
Answer: (a)
Explanation: Normal force becomes zero when downward acceleration = g.
Q13. A rocket works on the principle of:
(a) Newton’s first law
(b) Newton’s second law
(c) Newton’s third law
(d) Law of gravitation
Show Answer
Answer: (c)
Explanation: Rocket propulsion is an example of action-reaction force pair.
Q14. When two bodies of unequal mass collide elastically, the total momentum after collision is:
(a) Greater than before
(b) Less than before
(c) Same as before
(d) Cannot be predicted
Show Answer
Answer: (c)
Explanation: In elastic collision, total momentum is conserved.
Q15. A force acting for a short interval of time is called:
(a) Friction
(b) Tension
(c) Impulse
(d) Pressure
Show Answer
Answer: (c)
Explanation: Impulse = force × time; it is effective in short time intervals.
Q16. A person jumps out of a boat onto the shore. The boat moves backwards due to:
(a) Friction
(b) Gravity
(c) Newton’s third law
(d) Conservation of energy
Show Answer
Answer: (c)
Explanation: Recoil motion is due to equal and opposite reaction.
Q17. A block slides on a rough inclined plane with constant speed. This means:
(a) Net force is non-zero
(b) Acceleration is increasing
(c) Net force is zero
(d) Friction is absent
Show Answer
Answer: (c)
Explanation: Constant speed implies zero acceleration → net force = 0.
Q18. The impulse experienced by a body is equal to:
(a) Change in energy
(b) Change in velocity
(c) Change in momentum
(d) Product of acceleration and time
Show Answer
Answer: (c)
Explanation: Impulse = Change in momentum.
Q19. What is the unit of coefficient of friction?
(a) N
(b) N/kg
(c) Unitless
(d) m/s²
Show Answer
Answer: (c)
Explanation: Coefficient of friction is a ratio of forces, hence dimensionless.
Q20. Which of the following is an example of pseudo force?
(a) Tension
(b) Gravity
(c) Friction
(d) Force felt in an accelerating elevator
Show Answer
Answer: (d)
Explanation: Pseudo forces appear in non-inertial frames like accelerating elevators.
We hope the given mcq questions with Answers for Laws of Motion Class 11 helps you in your learning.
Also check
- Gravitation – Class 11 Physics Chapter 7 MCQ Questions with Answers (Updated)
- System of Particles and Rotational Motion – Class 11 Physics Chapter 6 MCQ Questions with Answers (Updated)
- Work, Energy, and Power – Class 11 Physics Chapter 5 MCQ Questions with Answers (Updated)
- Laws of Motion – Class 11 Physics Chapter 4 MCQ Questions with Answers (Updated)
- Motion in a Plane – Class 11 Physics Chapter 3 MCQ Questions with Answers (Updated)
- Motion in a Straight Line – Class 11 Physics Chapter 2 MCQ Questions with Answers (Updated)
- Units and Measurements – Class 11 Physics Chapter 1 MCQ Questions with Answers (Updated)
🚀 Boost Your Exam Prep: Get MCQ Questions for all subjects (Class 6-12) now!
👉 Explore more resources on CBSE Class 11
Topics from which mcq questions may be asked
- Newton’s laws of motion
- Friction
- Circular motion
Newton’s laws are the pillars of classical mechanics.
Frequently Asked Questions (FAQs) on Laws of Motion MCQ Questions
Q1: What is the best way to prepare for Class 11 Physics MCQ questions?
A1: The best way is to study NCERT concepts thoroughly, practice topicwise MCQs regularly, and focus on understanding fundamental principles rather than rote learning. Solving previous year MCQs and mock tests can boost accuracy and speed.
Q2: Are NCERT questions enough for Class 11 Physics MCQ-based exams?
A2: NCERT forms the base for all CBSE Physics MCQs. However, for better preparation, students should solve additional MCQs from reference books and practice HOTS and competency-based questions to develop deeper conceptual clarity.
Q3: Where can I find chapterwise Class 11 Physics MCQ questions with answers?
A3: You can find chapterwise MCQ questions with answers and detailed explanations on trusted educational platforms like xamcontent.com and physicsgurukul.com. These cover both basic and advanced-level questions.
Q4: Do CBSE Class 11 exams include MCQs?
A4: Yes, as per the latest CBSE exam pattern, objective questions, including MCQs, are part of the final exam paper. MCQs test conceptual understanding and application skills.
Q5: How to score high in Class 11 Physics MCQs?
A5: To score high, understand the theory from NCERT, solve a variety of MCQs (basic, conceptual, numerical), and regularly revise formulas and diagrams. Avoid guesswork and focus on time management during tests.
Q6: What are competency-based MCQs in Class 11 Physics?
A6: Competency-based MCQs assess a student’s ability to apply concepts in real-life or unfamiliar scenarios. These questions go beyond textbook definitions and require logical reasoning and application of physics principles.
