Question

give two ways to incresse friction
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Answer 1

Answer:

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.

Answer 2

Answer:

1. by making the surface rough
2. decrease in amount of lubricants on surface