Chapter 2 of 10
Revision Notes
Motion — Revision Notes
Tamil Nadu Board · Class 9 · Science
Motion revision notes for Tamil Nadu Board Class 9 Science: 4 topics in quick points. Part of the Tamil Nadu Board Class 9 Science syllabus.
44 questions29 flashcards5 concepts
Interactive on Super Tutor
Studying Motion? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.
Free trial, no card needed.
Super Tutor
One of 3 illustrations for Motion in Super Tutor — alongside flashcards, concept maps and practice questions.
Key Topics to Revise
1
1. Rest and Motion - Fundamental Concepts
- An object is at rest when it does not change its position with respect to its surroundings
- An object is in motion when it continuously changes its position with respect to its surroundings
- Motion is a relative phenomenon - an object can appear in motion to one observer and at rest to another
2
2. Uniform and Non-Uniform Motion
- Uniform motion occurs when an object covers equal distances in equal intervals of time (no matter how small or large the time interval)
- In uniform motion, the speed remains constant throughout the journey
- Examples of uniform motion: A car moving at constant speed on a highway, a train moving at constant velocity on a straight track
3
3. Distance and Displacement
- Distance is the total length of the path traveled by a moving object, irrespective of direction
- Distance is always positive and cannot be zero if the object has moved
- Distance depends on the actual path taken, not the starting and ending points
4
4. Speed and Velocity
- Speed is the rate of change of distance per unit time (distance/time)
- Speed is a scalar quantity - only has magnitude, no direction
- Average speed = Total distance traveled / Total time taken
Get complete notes with diagrams and examples
Full NotesKey Concepts
In physicsDistance is the actual lengthSpeed is the rate atAcceleration is the rate of changeUniform motion occurs when an object
Frequently Asked Questions
What are the important topics in Motion for Tamil Nadu Board Class 9 Science?
Key topics in Motion include Rest and Motion - Fundamental Concepts, Uniform and Non-Uniform Motion, Distance and Displacement, Speed and Velocity. Study these first, then practise questions on each for Class 9 exams.
How should I revise Motion for Class 9 exams?
Learn the core ideas first, then work through the 44 practice questions on Motion. Revise 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.
More resources for Motion
For serious students
Get the full Motion chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Tamil Nadu Board Class 9 Science. Free to start, no card needed.