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# Friction

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### Friction

1. 1. Made by :- Arpit Lekurwale
4. 4. 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
6. 6.  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
8. 8.  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. 9.  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
11. 11.  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. 12.  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. 13.  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. 14.  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