Question

Question 11
Two boys are riding their bicycles on the same concrete road. One has new tyres on his bicycle while the other has tyres that are old and used. Which of them is more likely to skid while moving through a patch of the road which has lubricating oil spilled over it?

Answer 1

The tyre which has been used and old is more likely to skid.
A new tyre's surface is made in such a way that there is sufficient friction between the tyre and the road. As the tyre is used, wear and tear happen on the tyre and the surface of tyre smoothens thereby reducing friction between tyre and road. So, it is more likely to skid.