The snowy road in Dalian was slippery, and a video of a car climbing up a snakeskin went viral. How can this move be explained physically?

The snowy road in Dalian is slippery, and a video of a car climbing up a snakeskin has become popular. How can this behavior be explained from a physical perspective? The answer is as follows:

1. The friction force of left and right motion is greater than the friction force of straight motion

Let’s conclude this for the time being. Without considering the turning behavior, the wheels roll vertically front and back during driving. It is a cycle, and friction is used to achieve the purpose of action. Now that we are entering winter, there is heavy snowfall in many places, and the road surface is basically either icy or slippery. Slippery roads will cause vehicles to slip. The root cause of slippage is poor grip, and poor grip is due to insufficient friction. This is easy to understand. Some large trucks will add anti-skid chains to the wheels in order to increase friction so that the wheels will not slip and have strong grip. Once the grip is enhanced, the chance of the vehicle skidding will be greatly reduced. Although the snake-like movement of this car looks ridiculous, the principle is correct. At least from this point of view, the friction force of the snake shape is greater than the friction force of straight movement.

Second, snakes that move straight are not as fast as snakes that move straight.

If we pay attention to observation, we will find that snakes that move straight are often very slow, and they will not last long. Stop or change driving style, and regular ?S? driving will move freely. The car also drives in this way, which increases the friction of its own vehicle to a certain extent, which results in the vehicle climbing successfully. I believe everyone can understand this principle after thinking about it. From small to large physical phenomena, such phenomena exist everywhere in life. It can be said that physics is inseparable from everything in our lives. The structure of people's soles, the texture structure of wheels, etc.

Third, even if physics is good, safe driving is the first priority

The video of the car has been widely circulated on the Internet, and many netizens also said: "Physics is good for driving" No worries?, although that is said, there are certain safety risks, so it is not recommended that everyone adopt the same method when encountering similar situations. There are thousands of roads, safety comes first. You and I drive in a civilized manner, and traffic safety depends on everyone. Driving irregularly makes people in Qin burst into tears. These slogans are not groundless.

In summary, additional discussions are welcome, and if the answer is difficult, please pay attention!