Advantages of friction.pptx

The presentation is meant for middle school level science or physics students

1. Advantages of friction Middle School Physics ~ Lalit Ki shore , The Plenum School, HP

2. Importance of friction Plays important role in daily life activities In walking In writing In transmitting motion Producing energy or heat and sound

3. Advantages of friction 2 When we hammer the nail into wood or wall, it is held tightly due to friction the surface of the the nail and the other material

4. Advantages of friction 1 Helps in walking We push the ground backward and force of friction works in opposite direction (in forward direction) to make us move without slipping

5. Advantages of friction 3 Brake shoes when pressed against the moving wheel rim, the wheel stops spinning and the vehicle stops

6. Advantages of friction 4 We can hold an objects because of the friction between the surfaces of hand and the surface of the object

7. Advantages of friction 5 We can write on surfaces because of the friction between the writing surface and ink in the pen; between the surface of the white board and the marker

8. Advantages of friction 6 Due to friction, when surfaces are rubbed together, sound is produced. Rub a wire or sand paper, sound will be produced.

9. Advantages of friction 7 When a match stick is rubbed on a rough surface, friction produces heat to make the chemical / sulphur in match stick to light up

10. Advantages of friction 8 We can climb up poles and trees due friction between the surfaces, or else we will slip.

11. Advantages of friction 9 Motion is transmitted from place place to another through conveyer belts, chains and cogwheels due to friction between them.

12. Methods of increasing friction By creating grooves, shallow cuts, depressions on the surfaces, we get better grip. For example the soles of shoes are grooved for creating friction between the surfaces Tractor wheels are treaded heavily so as not to allow the them slip in wet soil Gymnasts, weight lifters and wrestlers apply coarse powdery material on hands to get better grip