How does friction increase and decrease- nbsp-

Friction can be increased by: nbsp;Adding sand or soil in between the surfaces. nbsp;Increasing the roughness of the surface.Friction force can be reduced b ...

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Standard IX

Physics

Frictional Force

how does fric...

Question

how does friction increase and decrease?

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Solution

Friction can be increased by:
Adding sand or soil in between the surfaces.
Increasing the roughness of the surface.
Friction force can be reduced by:
Applying grease or oil or graphite between the moving parts of the machine.
An air cushion between the moving body and the ground also reduces friction.

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