# Why do the load-carrying heavy vehicles have large number of wheels? - Science

Short Note

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

#### Solution

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.

Concept: Pressure on Solids
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#### APPEARS IN

Balbharati General Science 8th Standard Maharashtra State Board
Chapter 3 Force and Pressure
Exercise | Q 3.2 | Page 22