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Laws of Motion

CBSE · Class 11 · Physics

Complete topic list for Laws of Motion in CBSE Class 11 Physics. Key concepts, sub-topics, and what to focus on for board exams.

125 questions72 flashcards5 concepts

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4 Topics · CBSE Class 11 Physics

Topics in Laws of Motion

1

1. Aristotle’s Fallacy and the Law of Inertia

  • Aristotle held the flawed view that an external force is needed to keep a body moving.
  • Everyday experience can mislead because friction usually opposes motion and makes moving bodies slow down.
  • Galileo studied motion on inclined planes and inferred the law of inertia.
2

2. Newton’s First Law and Inertia in Daily Situations

  • If a body is at rest or moving with uniform velocity, the net external force on it is zero.
  • The first law explains why a stationary bus passenger lurches backward when the bus starts suddenly.
  • When a bus stops suddenly, the body continues moving forward due to inertia.
3

3. Momentum and Newton’s Second Law

  • Momentum is a vector quantity.
  • Momentum depends on both mass and velocity.
  • A greater change in momentum in a given time needs a greater force.
4

4. Impulse and Force-Time Relation

  • Impulse is the product of force and time duration.
  • Impulse equals change in momentum.
  • Impulse becomes important when a large force acts for a very short time.

Key Concepts

Central concept: Laws of Motion

Aristotle's fallacyLaw of inertiaNewton's first lawMomentumNewton's second lawImpulseNewton's third lawConservation of momentum

Frequently Asked Questions

What are the important topics in Laws of Motion for CBSE Class 11 Physics?
Laws of Motion covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Laws of Motion — CBSE Class 11 Physics?
Understand the core concepts first, then work through the 125 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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