Laws of Motion MCQs – Newton’s Laws Practice

Class: 11
Subject: Physics
Section: Laws of Motion
Topic: Newton’s Laws Practice MCQs
Board: CBSE Board Examination (NCERT Based)

Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 11 board examination standards.

Q1. Newton’s First Law is also known as:

A) Law of Acceleration
B) Law of Inertia
C) Law of Momentum
D) Law of Gravitation

Answer: B) Law of Inertia

It states that a body remains at rest or in uniform motion unless acted upon by an external force.

Q2. Inertia depends on:

A) Velocity
B) Mass
C) Acceleration
D) Force

Answer: B) Mass

Greater the mass, greater the resistance to change in motion.

Q3. SI unit of force is:

A) Joule
B) Newton
C) Dyne
D) Watt

Answer: B) Newton

1 Newton = force needed to accelerate 1 kg by 1 m/s².

Q4. Newton’s Second Law relates force with:

A) Velocity
B) Momentum change
C) Displacement
D) Energy

Answer: B) Momentum change

Force = Rate of change of momentum.

Q5. If net force is zero, acceleration is:

A) Infinite
B) Constant non-zero
C) Zero
D) Increasing

Answer: C) Zero

From F = ma, if F = 0 → a = 0.

Q6. Unit of momentum:

A) kg m/s B) N/m C) Joule D) Watt

Answer: A
p = mv.

Q7. Action–reaction forces act on:

A) Same body B) Different bodies C) Same point D) Same direction

Answer: B
Equal & opposite on different bodies.

Q8. Rocket motion based on:

A) First law B) Second law C) Third law D) Gravitation

Answer: C

Q9. Impulse equals change in:

A) Force B) Energy C) Momentum D) Velocity

Answer: C

Q10. Seat belts work on:

A) Inertia B) Momentum C) Friction D) Gravitation

Answer: A

Q11. Force required to double acceleration:

A) Half B) Double C) Same D) Zero

Answer: B

Q12. Net force direction equals:

A) Velocity B) Acceleration C) Momentum D) Displacement

Answer: B

Q13. Balanced forces produce:

A) Acceleration B) Rest/change C) No acceleration D) Infinite motion

Answer: C

Q14. Unbalanced force causes:

A) No motion B) Acceleration C) Rest D) Constant energy

Answer: B

Q15. Mass × acceleration gives:

A) Work B) Power C) Force D) Energy

Answer: C

Q16. Unit of impulse:

A) N·s B) N/m C) kg D) J

Answer: A

Q17. Heavier body has:

A) Less inertia B) More inertia C) No inertia D) Same always

Answer: B

Q18. Third law conservation relates to:

A) Energy B) Momentum C) Charge D) Mass

Answer: B

Q19. Kicking a ball illustrates:

A) First law B) Second law C) Third law D) Gravitation

Answer: C

Q20. Rate of momentum change equals:

A) Energy B) Force C) Work D) Power

Answer: B

Q21. Friction is a:

A) Contact force B) Non-contact C) Nuclear D) Magnetic

Answer: A

Q22. Limiting friction occurs when body:

A) At rest B) About to move C) Moving fast D) Falling

Answer: B

Q23. SI unit of coefficient of friction:

A) Newton B) No unit C) Joule D) Watt

Answer: B

Q24. Pulling luggage on wheels reduces:

A) Mass B) Friction C) Force D) Momentum

Answer: B

Q25. Force pair in third law are:

A) Equal only B) Opposite only C) Equal & opposite D) Parallel

Answer: C

Q26. If mass doubles, inertia:

A) Halves B) Doubles C) Same D) Zero

Answer: B

Q27. Net external force zero → momentum:

A) Changes B) Conserved C) Zero D) Infinite

Answer: B

Q28. Recoil of gun due to:

A) First law B) Second law C) Third law D) Friction

Answer: C

Q29. Pushing wall → wall pushes back:

A) First B) Second C) Third D) Gravitation

Answer: C

Q30. Force needed to stop moving body relates to:

A) Inertia B) Gravitation C) Charge D) Density

Answer: A
Resistance to change in motion.

Laws of Motion MCQs – Newton’s Laws Practice

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