Explain the Use of friction in …

1. 1.We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail.
2. 2. A horse can not pull a cart unless friction furnishes him a secure foothold.
3. 3. you can sit on a chair but won't be able to get upon without Friction.
4. 4.You can't wear your dress,flipper etc without Friction.
5. 5. Friction helps you in writing as your pen or pencil won't work on Friction less surface.
6. 6. Friction helps in applying the brakes.

The force of friction may alter depending on the following factors that affect it:

• When two smooth surfaces are in contact, then the degree of friction between them is small because the interlocking between smooth surfaces is less.
• When two rough surfaces in contact, then the degree of friction between them is large because the interlocking of between rough surfaces is too much.
• It also depends on the weight of the object or on the amount of force applied on the surface by the object.