Class 11 Physics — Chapter 5: Laws of Motion
66 practice questions · 22 Easy · 22 Medium · 22 Hard
Practise Class 11 Physics Chapter 5, "Laws of Motion", with 66 NCERT-aligned multiple-choice questions. The set is split into 22 Easy, 22 Medium and 22 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Laws of Motion" is one of the chapters where numerical problem-solving, derivations and conceptual application really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Laws of Motion, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Physics mastery score. A few sample questions are shown below; sign in free to practise all 66.
Key concepts: Laws of Motion (Class 11 Physics)
This chapter covers Newton's three laws of motion, momentum, friction, and the dynamics of circular motion.
- Newton's laws
- First (inertia), second (F = ma = rate of change of momentum), and third (action–reaction on different bodies).
- Momentum & impulse
- Momentum p = mv; impulse = force × time = change in momentum.
- Conservation of momentum
- Total momentum stays constant when no external force acts — the basis of recoil and collisions.
- Friction
- Static (up to μsN) and kinetic (μkN) friction oppose relative motion; μs > μk.
- Circular motion dynamics
- A net centripetal force mv²/r is needed; on a banked road it is provided by gravity and the normal force.
Key formulas — Laws of Motion
💡 Exam tips for Laws of Motion
- Action and reaction act on different bodies, so they never cancel out.
- Draw a free-body diagram and resolve forces along/ perpendicular to the motion before applying F = ma.
Sample questions
Newton's first law is also called law of:
Bodies preserve their state of motion unless acted on.
Force on 5 kg mass with a = 3 m/s²:
F = ma = 15.
Maximum static friction is:
f_s,max = μ_s × Normal reaction.
Laws of Motion — FAQs
What are the key concepts in Class 11 Physics Laws of Motion?+
This chapter covers Newton's three laws of motion, momentum, friction, and the dynamics of circular motion. Key ideas include Newton's laws, Momentum & impulse, Conservation of momentum, Friction, Circular motion dynamics.
What does Class 11 Physics Chapter 5 (Laws of Motion) cover on XamBaaz?+
It covers 66 NCERT-aligned MCQs on "Laws of Motion" — 22 Easy, 22 Medium and 22 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Laws of Motion" questions free to practise?+
Yes — sign in with Google to practise "Laws of Motion" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Laws of Motion" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 66 questions free
Timed quizzes, instant scoring, streaks and XP. Sign in with Google — no card needed.
Start this chapter free →