Class 9 Science Notes –Chapter 4 Describing Motion Around Us

Master the fundamentals of motion with these comprehensive and easy-to-understand Class 9 Science notes on Describing Motion Around Us, prepared according to the CBSE 2026–27 syllabus.

The chapter is explained in a simple and systematic manner with important concepts, examples, graphs, formulas, and numerical problems to help students develop a strong understanding of motion.

Topics Covered

• Introduction to Motion

• Rest and Motion

• Reference Point

• Distance

• Displacement

• Difference Between Distance and Displacement

• Uniform Motion

• Non-Uniform Motion

• Speed

• Average Speed

• Velocity

• Average Velocity

• Difference Between Speed and Velocity

• Acceleration

• Uniform and Non-Uniform Acceleration

• Motion Along a Straight Line

• Distance-Time Graph

• Speed-Time Graph

• Velocity-Time Graph

• Interpretation of Motion Graphs

• Important Formulae

• Solved Numerical Problems

• Important Definitions