Question

how can you increase and decrease friction​

Answer 1

Answer:

By making the surface rough ,friction force can be increased. Examples of increasing friction-the tyres of a motor car and bicycles are made rough to increase the friction . when a ground or surface become slippery after rain or water splashing it is made rough by spreading sand to increase the friction.

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Answer 2

Answer:

Friction can be decreases by

1. polishing
2. lubricating
3. streamlining
4. ball bearings

it can be increased by

1. rough surfaces