Question

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a.Why do the load carrying heavy vehicles have large number of wheels?​

Answer 1

Answer:

So, the load carrying heavy vehicles have large number of wheels so that the pressure on the road is reduced due to larger contact area. Also, using large number of wheels ensures that the force due to the load is shared among the tyres and no single tyre is under stress.

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Answer 2

As we know that the Pressure(proportional) α Force over area , That means when the Area is more the Force applied will be less while when area is less the the force applied will be more .

So the load carrying heavy vehicles have large number of wheels so that the cross section on decreases and the force is distributed over more area and thus decreasing the pressure on the wheels of heavy load carrying vehicles .

And therefore larger number of wheels are present in heavy load carrying vehicles .