Graphs,class 9

🌈 Graphs (Class 9 Physics)

🔴 Definition of Graph

• Graph shows relation between two variables
• Independent variable → X-axis
• Dependent variable → Y-axis

🟠 Importance of Graphs

• Helps study motion easily
• Shows changes clearly
• Makes comparison simple

🟡 Displacement-Time Graph

• Shows displacement with time
• Slope gives velocity
• Horizontal line → Rest

🟢 Velocity-Time Graph

• Shows velocity with time
• Slope gives acceleration
• Area gives displacement

🔵 Acceleration-Time Graph

• Shows acceleration with time
• Area gives velocity
• Zero line → Uniform motion

🟣 Types of Motion

• Body at rest
• Uniform motion
• Non-uniform motion

⚫ Slope and Area

• Slope of d-t graph → Velocity
• Slope of v-t graph → Acceleration
• Area under graph gives physical quantity

🌈 Motion Graphs (Class 9)

🎯 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

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📝 MCQ Quiz

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

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🧠 HOTS

1. Why are graphs better than tables?

Graphs show trends clearly and quickly.

2. What does negative slope mean?

Motion in opposite direction.

3. Why curved graph shows non-uniform motion?

Because speed changes with time.

4. Can area be negative?

Yes, depending on direction of motion.

5. What does zero acceleration mean?

Velocity remains constant.