USEFULL AND HARMFULL EFFECTS IN FRICTION

USEFULL EFFECTS

       1.       It is impossible for every body to walk on  the road without the effects of friction.

       2.       Machineries can do useful work with the aid of friction force.

       3.       When we write something on the exercise book or black board , it is due to friction.

       4.       If we pullout nail from wood the frictional force offer.

      5.       When ladder is placed with its one end on the vertical wall and the other end at floor , the frictional forces prevent the ladder from slipping due to friction.

      6.       When we do some work by our hands , things does not slip from our hand due to frictional effect.

 

HARMFULL EFFECTS

       1.       Large amount of power has been last due to friction in engines, gears , trains , bearings etc.

        2.       Changes of wirn out of machine tools due to friction.

        3.       When a fluid run over a pipe  there is a chance of producing heat due to friction.

        4.       Heat generated due to fluid friction between air and outer surface of air –craft.

        5.       Due to frictional effects of dry leaves of a forest , changes of great firing.