what is the reason that we construct vehicel's wheel circular ?

Answer 1

# Low resistance to friction for the circular shape.

-The low resistance to motion (compared to dragging) is explained as follows :

*the normal force at the sliding interface is the same.
*the sliding distance is reduced for a given distance of travel.
*the coefficient of friction at the interface is usually lower.

-A wheel together with an axle overcomes friction by facilitating motion by rolling.
[-The magnitude of the rolling friction between dry surfaces is influenced by the coefficient of friction between the surfaces in contact, the normal reaction force, the radius of curvature of the wheel, and the deformability of the rolling object. The amount of rolling friction is changed dramatically if a liquid occurs between the surfaces.]
-You will get a perfect linear motion if you are using circular shape.
If the motion is not linear, then you have to bear lot of wear and tear of the parts of the vehical.
Your condition will be miserable , as non-circular shape gives you hap-hazards movement to your vehicle and you which in turn it causes loss of control and accidents.

Answer 2

Not everyone does, and there is no necessity to have them circular. Caterpillar tracked vehicles don't have circular wheels, and non circular steering wheels can have big advantages over circular ones.
However, all companies making rectangular road wheels have ceased trading, so most firms stick to circular wheels.

Answer 3

We, don't. Train makers do.
Which is really why most people
who understand engineering
make robots for train makers
rather than roads.

Answer 4

Because if they were square your teeth would rattle out of your head and your kidneys would fail in short order.

Answer 5

reason is nobody's reinventing the shape of the wheel nowadays

Answer 6

you ever tried square ones?