Question

2 boys are riding their bicycles on a road.One has new tyres while the other has old tyres.The bicycle with the old tyres skid.Why?

Answer 1

Explanation:

the cycle with the old tires, due to friction between the ground is flattened a little bit

while the new tires will have more friction as it has not been ridden even once

due to friction the cycle with the old tires will skid

Answer 2

The tyres are made up of rubber and it has grooves on the outer end so as to increase the friction between the tyres and surface . With time as the tyres are used , it's surface gets smooth and looses the grooves .

Since there is lesser friction in the case of older tyre , hence it skids.

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