Question

why do the loard crrying heavy vehicles have large number of wheels?

Answer 1

if there are less no. of wheels.. it becomes almost impossible for heavy loaded trucks to balance and move.. hence it is obvious that the loaded trucks have many wheels

Answer 2

Thanks for your question !

    Very simple! As the load carrying large and heavy vehicle more and wide area. Hence, it will apply more pressure in ratio to its area and weight. To distribute this pressure, there will be obvious need of force. This force is given by the tires. Hence, more the pressure, it will need more force. And thus, more tires (large number of tires) would be used.