Question

explain the method to increase friction and decrease friction​

Answer 1

Explanation:

Method of increase friction

1. Making the surface rough
2. Increasing the mass of the body that is moving .

Method of decrease friction

1. By polishing the surface, as polishing makes the surface smooth and friction can be reduced.
2. Using lubricants such as oil or grease can reduce the friction between the surfaces

Answer 2

Answer:

To increase friction

by making the surface rough, friction force can be increased. example example of increasing friction the tires of a motor cars and bicycles mail draught to increase the friction. when the ground surface becomes sleepery after rain or water splashing it is made rough by spreading sand to increase the friction.

To decrease friction

1. friction friction between two surfaces can be decreased by using lubricants.
2. friction friction between two surfaces can be reduced by polishing them. The interlocking and projections are increased by this method.
3. The friction due to air is reduced