Question

Worn out tyres should be discarded . Give reasons

Answer 1

Answer:

When the tyres are, worn out, their groves disappear due to the constant use; this reduces the friction between tyres and road. The reduced friction increased the speed of vehicles, resulting the chances of accidents, that is why, worn out tyres are discarded.

Explanation:

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Answer 2

As the tyre gets worn out the dynamic friction between the tyres and the road surface gets reduced, thus during braking action the car is likely to slide. Also worn out tyres are likely to burst due to any sharp object and thus forcing the wheels to move on rim. Under such conditions, if brake is applied then the car can go under a spin.