Question

we make grooves in the tyres of bicycle to _________ friction​

Answer 1

Answer:

We make grooves in the tyres of a bicycle to increase friction

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Answer 2

Answer:

Grooves in the tyres of bicycle is to increase friction

Explanation:

Tyres have grooves to increase the friction between them and road. This enables the vehicle to make firm grip on road and prevent sliping. The grooves in the rubber are designed to allow water to be expelled from beneath the tire and prevent hydroplaning.