Ms_Shaista Khurshid - 25-2-14
A force is a push or pull acting upon an object. Friction is a force that is created whenever two surfaces move or try to move across each other.
Friction plays a vital role in our daily life. some of the advantages are:
-walking, riding a vehicle, striking a match, using a pen and chewing food.
Like advantages there are also some disadvantages of friction. Some of them are:
-Makes movement difficult, Wastes energy, Heats parts, Wears things out.
Some of the methods that reduce friction are:
use of lubricants , use of grease, use of ball bearing and design modification.