how car wheels turn

As is known to all, the man walks through the foot, the car runs through the wheel. In daily life, have you noticed how car wheels turn? Here, let me explain this question that how car wheels turn？

How car wheels turn？the question how car wheels turn is the same as how people walk.people walking will give the ground a backward friction, and at the same time to have a forward support force, the two force balance, people will be able to walk smoothly, not to fall, then  how car wheels turn？First the wheel is rotating to forms friction force to the ground. Assuming that the friction force is small, or even zero. The phenomenon is that the wheel is in the place, the car will not move forward or backward.Assuming that the friction is very big, even for the infinite, then the phenomenon is that the wheel on the ground is rolling restlessly, because the wheels and the car become the one, so it will drive the car forward or backward.

In general,how car wheels turn ?The answer to this question is clear that the results of force interaction.In our daily life, A lot of things like this, want to know the answers to these questions,.So we need to continue to learn and practice.knowledge is infinite, people's wisdom is infinite, I believe that everyone of us learns more and can make more progress.