Friction

EVS L-Friction advantages and dis advantages

1. friction Made by :- Arpit Lekurwale

2. 20/02/2014 2 Advantages and Disadvantages of Friction

3. Contents What is friction ? Advantages of Friction Disadvantages of friction 20/02/2014 3 Advantages and Disadvantages of Friction

4. What is Friction ? Friction (frictional force) is a force that acts in a opposite direction to movement. The force which always opposes the motion of one object over another, object in contact with it , is called friction. 20/02/2014 4 Advantages and Disadvantages of Friction

5. Advantages of Friction 20/02/2014 5 Advantages and Disadvantages of Friction

6. 1.Friction enables us to walk without slipping It is because of the friction between the sole of the shoe and ground prevents us from slipping. While walking , we push the ground backwards and the force of friction acts in the opposite direction (i.e . in the forward direction) and prevents us from slipping. By making the balance. 20/02/2014 6 Advantages and Disadvantages of Friction

7. Walking 20/02/2014 7 Advantages and Disadvantages of Friction

8. Friction helps us to walk Walking on slippery ground is difficult because friction on slippery ground is less due to which we may slip. 20/02/2014 8 Advantages and Disadvantages of Friction

9. 2.Friction enables a car to move on road without skidding It is because of the friction between the tyres of car and the road which enables car to move forward without skidding. If there were no friction , car would stay where it was. 20/02/2014 9 Advantages and Disadvantages of Friction

10. Car move due to the friction 20/02/2014 10 Advantages and Disadvantages of Friction

11. 2.Friction enables a car to move on road without skidding It becomes sometimes difficult to drive and control car on wet road. This is because of water present on road reduces friction. 20/02/2014 11 Advantages and Disadvantages of Friction

12. 3.Friction Enables Us to Write and Draw on Paper It is because of the friction between the tip of the pencil ( or pen) and paper. Carbon particles from the pencil lead rubs off from it, due to the friction, which appears as black marks on the paper. 20/02/2014 12 Advantages and Disadvantages of Friction

13. 4.Friction Enables Us to Pick Up and Hold Things in Our Hands We can hold a glass tumbler in our hands because of friction between the tumbler and our hands. Similarly, we can pick up the books laying on the desk by our hands. 20/02/2014 13 Advantages and Disadvantages of Friction

14. 5.Friction Enables us to Light a Matchstick Friction also produces heat. We rub matchstick against the rough side of a matchbox, then friction between both of them produces heat and this heat burns chemicals present at the head of matchstick and it lights up. 20/02/2014 14 Advantages and Disadvantages of Friction

15. Disadvantages of Friction 20/02/2014 15 Advantages and Disadvantages of Friction

16. 1.Friction Wears Away the soles of Our Shoes When we walk on the road, tiny surfaces of the shoe keep on breaking off slowly due to which the soles of our shoes wear out slowly Due to which shoes get damaged and becomes unfit to wear. 20/02/2014 16 Advantages and Disadvantages of Friction

17. After Before 20/02/2014 17 Advantages and Disadvantages of Friction

18. 2.Tyres of Vehicles Wear out Gradually Due to Friction Like the shoe tiny particles of tyres also breakdown due to friction when they run on road. The same thing also happens with the bicycles 20/02/2014 18 Advantages and Disadvantages of Friction

19. Effect to Tyres Due to Friction Before After 20/02/2014 19 Advantages and Disadvantages of Friction

20. 3.Friction wears Out the Brake Pads of Vehicles Gradually Brake pad is made of rubber When the brakes of the vehicles are applied a lot of friction is produced Friction wears out the brake pads gradually Before - After 20/02/2014 20 Advantages and Disadvantages of Friction

21. 4.Friction wears Out Steps Of Staircases in Building and Foot Over-Bridges The friction between the soles of the shoes and wear away hard stone steps slowly. Such type of staircase are usually seen at : Railway station Offices Old Buildings 20/02/2014 21 Advantages and Disadvantages of Friction

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23. 5.Friction Slows Down Motion Friction reduces the motion of moving parts of a machine . In fact all the moving things such as (cars , buses, airplanes, boats, ships ,etc.) are slowed down by friction. 20/02/2014 23 Advantages and Disadvantages of Friction

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26. Conclusion Friction is a necessary evil We hate it sometimes but we also need it . It is very useful and but harmful too. 20/02/2014 26 Advantages and Disadvantages of Friction

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