Question

write any three situation where we can increase friction and any two methods by which we can reduce friction with example​

Answer 1

Explanation:

increase friction by using a rough surface or an irregular surface

reduce friction by smoothing the surface or by applying lubricants such as oil ......

Answer 2

Answer:

To reduce friction we can make the surfaces in contact smooth. Also adding a lubricant to two surfaces in contact reduces friction between them. Grease is added between the moving parts in machines, to reduce friction. Another method of reducing friction is by using bearings. When ball bearings are introduced between two surfaces friction is reduced because of the freely rotating metal balls.

To increase friction, the surfaces in contact have to be made rough. The two surfaces in contact can also be pressed harder to increase force between them. Use of adhesive materials that stick surfaces , also increases friction between them.