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?


NCERT Class VIII
Science - Exemplar Problems

Chapter 12. Friction

2

Answers

2015-06-12T23:29:07+05:30
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 tyre and the road. As the tyre is used, wear and tear happens in the tyre and the surface of tyre smoothens thereby reducing friction between tyre and road. So it is more likely to skid.
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2015-06-13T09:41:44+05:30
The bicycle with worn out tyres is more likely to skid.
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