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12. Friction
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Q57 of 100 Page 231

Explain why, sportsmen use shoes with spikes.

The sports people use shoes with spikes, spikes increase the friction with the ground and does not let the person slip or fall when running fast.


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55

Why do tyres of cars wear out gradually ?

56

State two advantages and two disadvantages of friction.

58

How will you reduce friction between those machine parts which rub against each other? Give the simplest method.

59

What is meant by lubrication ? Why is it important?

Questions · 100
12. Friction
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