Moment of force,class 8

Lesson Progress

🔧 Moment of Force (Torque)

Torque is the rotational correspondent of linear force. It is also referred to as the moment of force, or simply the moment.

🎯 Learning Objectives

• Understand the concept of moment of force.
• Learn the formula M = F × d.
• Identify factors affecting moment of force.
• Relate torque to daily life examples.

🧩 Competencies

• Conceptual understanding of turning effect
• Observation of real-life examples
• Analytical thinking with force and distance
• Application using tools like a spanner

📊 Learning Outcomes

• Defines moment of force clearly
• Applies the formula correctly
• Explains clockwise and anticlockwise moments
• Solves simple practical questions

🖼️ Concept Images

Turning effect of force in daily life

Force, pivot, and perpendicular distance

✨ Key Formula

M = F × d

Here, M is moment of force, F is force applied, and d is the perpendicular distance from the pivot.

🎮 Live Torque Simulator

Force (N) 10 N

Distance (m) 2 m

Moment of Force = 20 N m

10 N

🎥 Evidence (Student Demonstration)

Add your own student video below.

Replace YOUR-VIDEO-LINK.mp4 with your direct video URL. If you already uploaded a video in Blogger, use that video link here.

📝 Interactive Worksheet Quiz

1. I am the turning effect of a force.

Force Energy Moment of Force Work

2. I am the formula used to calculate moment.

F = ma M = F × d V = IR P = VI

3. I am the distance from pivot.

Force Distance Time Velocity

4. I increase moment when I increase.

Force Distance Both None

5. I am the point about which rotation occurs.

Axis Pivot Centre Base

6. I am positive rotation direction.

Clockwise Anticlockwise Upward Downward

7. I am used to tighten nuts.

Hammer Spanner Screwdriver Knife

8. I am the SI unit of moment.

joule newton metre watt pascal

9. Increasing distance increases me.

Force Moment Work Power

10. Opening a door is an example of me.

Work Force Moment of Force Energy

🧠 Higher Order Thinking Questions

1. Why is it easier to open a door from the handle?

Because the handle is farther from the pivot, so the moment of force becomes greater.

2. Why do we use long spanners?

A long spanner increases the perpendicular distance, so a larger moment is produced with the same force.

3. What happens if force increases but distance decreases?

The moment may increase, decrease, or remain the same. It depends on the values of force and distance.

4. Why do children sit farther on a seesaw?

Sitting farther from the pivot increases the moment of force and helps balance the seesaw.

Made By Ritu Teacher edited by Shaleen Shekhar