Motion Graphs Class 9 Physics

📈 Motion Graphs Class 9

Understand displacement-time, velocity-time and acceleration-time graphs with animated visuals, story pages, slope-area concepts, quiz and HOTS questions.

Class 9 Physics Motion Graphs Slope Area Under Graph Graph Interpretation

📖 Animated Motion Graphs Story Book

Cover Page

Click any page number to jump directly to that page. Click the image to open it in full size.

🌈 Motion Graphs Mindmap

🔴 Introduction

• Graph shows relationship between variables.
• X-axis → Independent variable.
• Y-axis → Dependent variable.

🟠 Graphical Representation

• Time on X-axis.
• Displacement, velocity or acceleration on Y-axis.
• Helps understand motion clearly.

🟡 Types of Graphs

• Displacement-time graph.
• Velocity-time graph.
• Acceleration-time graph.

🟢 Displacement-Time Graph

• Horizontal line → Rest.
• Straight line → Uniform motion.
• Curve → Non-uniform motion.

🔵 Velocity-Time Graph

• Horizontal line → Uniform velocity.
• Straight slope → Uniform acceleration.
• Curve → Non-uniform acceleration.

🟣 Acceleration-Time Graph

• Zero → No acceleration.
• Straight line → Uniform acceleration.
• Irregular → Non-uniform acceleration.

⚫ Slope and Area

• Slope of d-t graph → Velocity.
• Slope of v-t graph → Acceleration.
• Area under v-t graph → Displacement.
• Area under a-t graph → Velocity.

🎯 Learning Map

🎯 Learning Objectives

• Understand different motion graphs.
• Interpret slope and area.
• Relate graphs with real motion.

🧩 Competencies

• Analytical Thinking
• Graph Interpretation
• Problem Solving

📊 Learning Outcomes

• Identifies types of motion graphs.
• Calculates slope and area.
• Explains motion using graphs.

📌 Evidence

• Correct MCQ responses.
• Explains graphs in class.
• Solves graph-based problems.

📊 Interactive Graph Lab

Animated Displacement-Time Graph

The moving dot shows displacement increasing with time.

Displacement

Time

A straight sloping line in a displacement-time graph shows uniform motion.

Slope of d-t graph = Velocity

Slope of v-t graph = Acceleration

Area under v-t graph = Displacement

🧮 Slope and Area Calculator

Find Velocity from Displacement-Time Graph

Velocity = Change in displacement ÷ Time taken

Find Acceleration from Velocity-Time Graph

Acceleration = Change in velocity ÷ Time taken

Find Displacement from Velocity-Time Graph

For uniform velocity: Displacement = Velocity × Time

✅ Motion Graphs MCQ Quiz

Select the correct answer and click submit to check your score.

1. X-axis represents: Time Velocity Acceleration

2. Slope of displacement-time graph gives: Velocity Acceleration Distance

3. Area of velocity-time graph gives: Displacement Velocity Acceleration

4. Straight line in v-t graph indicates: Uniform acceleration Rest No motion

5. Zero slope in d-t graph means: Rest Motion Acceleration

6. Area of acceleration-time graph gives: Velocity Distance Time

7. Curved line in d-t graph shows: Uniform motion Non-uniform motion Rest

8. Horizontal v-t graph shows: Uniform velocity Acceleration Rest

9. Slope of v-t graph gives: Acceleration Velocity Distance

10. Graph helps to: Understand motion Increase speed Stop motion

🧠 HOTS Questions

Click each question to reveal the answer.

1. Why are graphs better than tables?

Graphs show trends clearly and quickly.

2. What does negative slope mean?

Negative slope means motion in the opposite direction.

3. Why does a curved graph show non-uniform motion?

Because speed changes with time.

4. Can area be negative?

Yes, depending on the direction of motion.

5. What does zero acceleration mean?

Zero acceleration means velocity remains constant.