Skip to main content
Super TutorResources
Chapter 3 of 12
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Laws of motion

Kerala Board · Class 9 · Science

Quick revision notes for Laws of motion — Kerala Board Class 9 Science. Key concepts, formulas, and definitions for last-minute revision.

44 questions20 flashcards5 concepts

Interactive on Super Tutor

Studying Laws of motion? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 9 students started this chapter today

Key Topics to Revise

1

Historical Background and First Law of Motion

  • Aristotle believed the natural state of objects is rest - objects naturally come to stop
  • Galileo challenged this through inclined plane experiments with smooth surfaces
  • Galileo observed: smoother surfaces allow objects to travel farther distances
2

Inertia and Mass

  • Mass is the measure of inertia - more mass means more inertia
  • Heavier objects are harder to start moving and harder to stop
  • Mass determines how much an object resists changes in motion
3

Linear Momentum and Second Law of Motion

  • Momentum depends on both mass and velocity - p = mv
  • Momentum is a vector quantity - direction same as velocity
  • Heavy truck causes more damage than bicycle at same speed due to higher momentum
4

Third Law of Motion

  • Third Law: For every action, there is equal and opposite reaction
  • Action-reaction forces act on different objects simultaneously
  • Action-reaction pairs are equal in magnitude, opposite in direction

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Every object remains at restInertia is the property that resistsThe rate of change of momentumMomentum (p) is the productFor every action

Frequently Asked Questions

What are the important topics in Laws of motion for Kerala Board Class 9 Science?
Laws of motion covers several key topics that are frequently asked in Kerala Board Class 9 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 — Kerala Board Class 9 Science?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

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

More resources for Laws of motion

All 12 chapters — Kerala Board Class 9 Science Revision Notes

For serious students

Get the full Laws of motion chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Kerala Board Class 9 Science.

Try Super Tutor Free
Try the full chapter — Free