![1cjb6h.png](https://img.esteem.app/1cjb6h.png)

[source](https://pixabay.com/id/photos/sepeda-motor-parkir-baris-kendaraan-654414/)
<h1> <center> The basic shape of the wheel is a circle </center> </h1>
Hello Steemian
When you enter the parking lot, you can see a lot of vehicles, cars, motorbikes and even bicycles. I immediately parked the motorcycle in the demonstration which was still empty.
At that time my son saw so many vehicles neatly arranged in a position that was parallel and well lined up. This neatness makes it easy for users to park or even take their motorbikes to go home.
Looks so much wheel rim. All are reorganized by the officers so that there are no motorcycles or cars parked haphazardly. This is a good step to teach discipline to all parking users.
"The vehicle is parked neatly. All wheels look the same," said the youngest.
"So what?' I asked.
"I see something interesting. All wheels are the same shape. All like a circle in school, Dad. Why is that?" the youngest asked.
Wow, this is a critical child question. As parents we must be able to explain with a simple and simple so that it is easy for children to understand.
I smiled and took him to a more shady place while drinking iced tea while explaining why the wheels were circular.

<h2> Efficiency and friction </h2>
Have we ever thought that the wheels are not made in the form of a circle? For example making wheels with a square or triangle shape?
If the wheels are triangular or triangular in shape, your motorbike will consume more gasoline because the sharp edges of the wheels will stick to the surface of the road (ground) so that you need extra energy to bring them back to the surface. Even just to change the position of one position to another will be very difficult and requires energy, especially if you have to go fast, of course there will be many obstacles encountered.
Likewise, comfort for the driver. How will a driver drive a vehicle on a relatively flat road but will feel lifted up and as if slammed after the corner of the road touches the road to align the wheel position with the road surface.
This is different from the circle. Circles that have an infinite angle make the wheel can continue to rotate without causing kickback for the driver. The driver will still feel comfortable when driving it. Likewise, the energy spent is relatively less because it converts rotational energy into kinetic energy.
On wheels with a circle, there are fewer fields that rub against the road. This will make the wheel speed faster and lighter. will certainly be different on square or other wheels. friction with the ground makes the wheel feel harder. That way we can understand why the wheels are bolted in a circle.
Thus my writing this time may be useful for all of us.

<h1> <center> Thank you for reading my post. I hope you enjoy it </center> </h1>