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प्रश्न
Why do the load-carrying heavy vehicles have a large number of wheels?
लघु उत्तर
उत्तर
We know, `"Pressure" = "Force"/"Area"`
So, greater the area of contact between two surfaces, lesser will be the pressure. So, the load-carrying heavy vehicles have a large number of wheels so that the pressure on the road is reduced due to the larger contact area. Also, using a 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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