Question

methods of reducing and increasing friction with the help of a suitable graphic organiser
the answer should be in picture ​

Answer 1

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.

Explanation:

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Answer 2

Method of increasing friction:-

• By making the surface rough.

• By removing all the lubricants.

• By increasing the mass of the body.

• By applying coarse powder.

• By rub your hands with mud.

Method of reducing friction:-

•By oiling.

•By greasing.

•By applying paint.

•By using roller wheel.

•By making the surface smoothy.

•By making the body streamlined.

•By spraying or sprinkling powder.

• By using ball bearings.