🚀 Motion Class 9 Science | Chapter 7 | Distance, Displacement, Speed, Velocity, Graphs | NCERT

Описание: Welcome to NCERT Pathshala, your trusted channel for simple, clear and exam-oriented NCERT explanations!
In today’s detailed and visually rich lecture, we cover Class 9 Science Chapter 7/8 – Motion, one of the most important chapters in Physics.

Motion is everywhere around us — from a running athlete to a launching rocket, from flowing rivers to revolving planets. Understanding motion helps us understand the world around us scientifically. This chapter is the base for Class 10 Physics and higher classes like Class 11 Mechanics, making it extremely important for all students.

In this video, we explain every concept with examples, animations, graphs, formulas, and numericals, following the latest NCERT syllabus. Whether you are preparing for school exams, CBSE board, class tests, Olympiads, or NTSE, this video will help you fully master the chapter.

🔺 What You Will Learn in This Video (Full NCERT Coverage)
✔ 1. What Is Motion?

We begin by understanding the difference between rest and motion, and how motion is always relative. Real-life examples like moving trains, buses, airplanes, and walking people make this concept easier.

✔ 2. Distance and Displacement

This is one of the most confusing topics for students — but not anymore!
We explain:

Distance: total path covered

Displacement: shortest straight-line distance

Scalar vs vector quantities

Cases where distance ≠ displacement

When displacement = 0 even though distance ≠ 0
Animated diagrams help you visualize every situation.

✔ 3. Uniform and Non-Uniform Motion

We explain the difference between equal distances in equal intervals vs varying distances. Examples include:

A car moving at constant speed

A train slowing down

A ball rolling downhill

These real-world examples make the concepts extremely easy to understand.

✔ 4. Speed, Velocity & Their Types

Speed and velocity are commonly confused, so we break them down clearly:

Speed = distance/time (scalar)

Velocity = displacement/time (vector)

Uniform speed

Average speed

Instantaneous speed

Uniform velocity

Average velocity
Students will also learn why average speed and average velocity can be very different in some cases.

✔ 5. Acceleration

Acceleration is explained using real-life examples like:

A bike speeding up

A car slowing down

A ball thrown upward
We also explain positive acceleration, negative acceleration (retardation), and zero acceleration.

📈 Graphical Representation of Motion (Most Scoring Topic)

This is one of the most important parts of the chapter and is guaranteed in exams.
We cover with animations:

Distance–time graph (straight line & curved line)

Speed–time graph

Velocity–time graph

You will learn:
✔ How to interpret graphs
✔ What slope represents
✔ How to calculate acceleration from velocity–time graph
✔ How to calculate distance covered using area under the curve

This visual explanation will make graphs your strongest topic!

🧮 Equations of Motion (Derivation + Numericals)

We explain the three equations of motion step by step:

v = u + at

s = ut + ½at²

v² – u² = 2as

You will see both graphical and mathematical derivations.
We also solve important NCERT numericals, sample questions, and past-year exam questions.

🚗 Uniform Circular Motion

We explain:

Why is speed constant but velocity changing?

Why is acceleration always toward the center?

Real-life examples: Ferris wheel, satellite motion, stone tied to a string.

This topic forms the base of higher physics (Class 11 circular motion), so our explanation is crystal clear and engaging.

🎯 Why This Video Is a Must-Watch?

✔ Full NCERT coverage
✔ Easy explanations with real-life examples
✔ 3D animations and simplified diagrams
✔ All formulas covered
✔ Numerical problem-solving
✔ Board and exam-oriented concepts
✔ Perfect for last-minute revision

Whether you are a school student or someone preparing for competitive foundations, this video will make the chapter extremely easy.

📂 Includes:

Full notes

Numericals

NCERT Solutions

Extra questions

Graphs and formulas

Previous year questions

Quick revision summary

💡 Best For:

Class 9 Students | CBSE | NCERT | State Boards | NTSE | Olympiad | Foundation Courses | School Exams

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