Question

List ways by which friction can be increased and reduce​

Answer 1

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There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the 'designs' that you can see on the tyre surface), which increase the friction between the tyre and the road.

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Answer 2

Answer:

INCREASING FRICTION

1.BY INCREASING THE MASS OF THE OBJECT THAT IS MOVING

2.BY INCREASING THE ROUGHNESS OF THE SURFACE

DECREASING FRICTION

1.BY MAKING THE SURFACE SMOOTH.

2.BY USING LUBRICANTS

3.BY USING BALL BEARINGS TO MOVE THE OBJECT