Dangerous that no one knows because the fault waiting for the train is not correct

Everyone knew that the train had to stop and wait. But it seems we are still too subjective.

No one needed to teach, if no one wanted to die, no one would rush into the train when the train was going. Everyone will stop and wait for the train to finish before going on.

But don't think stopping is safe. Evidence is that recently, there was a case where a man who was killed by a train stopped standing by while waiting for the train to run. According to what was told, he stood about a meter away from the railroad tracks, but was then "sucked, swept into a wheel at any time".

It is also the mistake that many people are making: waiting for trains at too close a distance.

There have been many cases of being attracted by trains when waiting too close.

Why is smoking?

To understand the nature of this, we will come to the theory of Daniel Bernoulli - the Swiss mathematician.

According to Bernoulli's Law of fluid mechanics, the greater the flow of the liquid, the lesser the pressure around it decreases.

The flow of air flow is the same as flowing water, so Bernoulli's law can also be applied. First, the ship will occupy a void in the air, ie when it moves, it will create an air flow along the hull, filling the gap it leaves.

If you stand close enough, you can get caught up in a train without any resistance.

The faster the ship moves, the faster the flow velocity, ie, the surrounding pressure drops very sharply. When the train passes by you, the air pressure between the two will also decrease.

At this point, there will be a pressure difference between the air in front and behind you. The air always moves from high pressure to low pressure, thereby unintentionally forming a push from behind us.

And you know, this thrust depends on the speed of your train and the distance you can reach nearly 1900N. To make it easier to imagine, this force is equivalent to the force produced when you lift an object that weighs about 190kg. That is, if you stand close enough, you can get caught up in the train without any resistance.

So how to stand? In the city, we have the road to block the ship. As usual, it's best to stand at a distance of 2m or more from the boundary line. You'll be OK.

Absolutely not stand near the train!

It is not just trains that attract people like that

On the highways, drivers sometimes carelessly drive cars parallel to bulky container cars, not knowing that the things we just discussed above also apply in this case.

Like trains, along the body of the vehicle will be an air flow, creating a very stable suction force. But the problem is that you don't stand still as if waiting for a train that is traveling on another vehicle, at the same speed or more than the other truck.

Never overtake big cars.

This makes the pressure between the two cars diminish, and once again Bernoulli's Law applies, forming a force that attracts smaller cars to the truck.

Of course, considering the vehicle's speed and weight, this attraction doesn't seem to be big enough to attract cars, as long as you hold the steering wheel firmly. However, unfortunately, there are conditions such as rain, slippery roads . can you guarantee that you can keep your hands steady? Moreover, there is no guarantee that the truck driver will not get lost in the steering wheel.

In short, never overtake big cars . And if you're driving a motorbike, absolutely don't go parallel or close. Oan network like playing!