Jumping in the high speed train is different from jumping on the roof of the car

The reason why jumping in the high-speed train is different from jumping on the roof of the train is that the movement state is different when jumping.

When jumping inside a high-speed rail, you may feel a brief acceleration due to the interacting forces between the motion of the train and your jumping action. The magnitude of this acceleration depends on the speed of the train and your ability to jump. At the moment you jump, the train is subjected to a force that is opposite to the direction of your jump, which causes the acceleration of the train to decrease and change the direction of travel of the train for a short time.

But due to the mass of the train, its acceleration is so small that you can hardly perceive its changes. After your jump, you'll return to the inside of the train and continue moving forward, maintaining the same speed as the train.

And when it comes to high-speed rail roof jumping, the situation will be completely different. Because when the train is moving, the roof is also moving, so when you jump on the roof of the train, it is likely that you will move in the opposite direction of the roof due to inertia, causing a collision or fall.

In short, the movement state of jumping inside the high-speed train and jumping on the roof of the car is different, resulting in a different effect of jumping.

Because when jumping, there will be a forward speed before the car leaves the ground, so the jump and fall in the carriage are still in place, and the roof of the car has an extra wind resistance, and the wind resistance will prevent you from jumping forward movement, so it is not falling in place.

The speed of the high-speed train is 300 per hour, and it is difficult for you to climb on the roof of the car, let alone jump, and it is impossible for you to stand on the roof and talk.

On the motor train with uniform linear motion, the passengers and the air in the carriage are moving together with the car, and the passengers jump up vertically, and the movement state is constantly changing due to the action of gravity (and air resistance) in the vertical direction, first decelerating and rising and then accelerating down. People in the train, the car, the people, and the air inside the car are one, doing constant velocity motion, the air outside the car can be considered to be stationary, and the car and the outside air are doing relative motion. When people are on the car, it becomes that people and the outside air are integral, and the train and the outside air are in relative motion, and it is dangerous to jump again.

Jump on the roof of the car, and the movement in the vertical direction is the same as in the car. The air on the top of the car in the horizontal direction is moving backwards relative to the car and the person, and there is backward resistance to the person, so that the speed of the person decreases, which is less than the speed of the car, so it will fall behind the starting point. If the air is moving at the opposite speed of the train relative to the car, and you are moving at the same speed as the car, your body will bear the resistance of the air, and you must use your feet to grip the roof of the car, or grab other objects on the roof of the car with your hands to counteract the resistance of the air.

In case your feet and hands leave the roof of the car, you will fly forward at the speed of the car for a while, and immediately you will be forced to fly backwards by the air resistance, and under the action of gravity, you will fall back to the roof of the car relative to the original position, the higher you jump, the farther back.

The car is moving, you are moving with the car, and you are jumping, you are not moving around, of course you are still in the original position, you mean that you jumped up and left the earth, the earth is rotating, you should move a position when you fall, in fact, although you jumped up and thought that you left the earth, but you did not leave the earth, because the earth rotates and the air also rotates with the earth, of course you also rotate with the earth, so you are still in the same position and do not move, you must know that the earth and the air are one, The earth revolves and the air revolves. If the train suddenly stops at the moment when a person jumps on a moving train, the person will not fall in place when he falls, but will continue to move in the direction of the train's movement.

I think the main reason is that when the high-speed rail starts, the air in the carriage is not circulating, and the passengers and the air in the carriage are in a relatively static state.

Because in the high-speed rail, people and high-speed trains run at the same time, so the jump is still in place. On the roof of the car, because the speed of the car is too fast, due to the effect of convention, so jumping on the roof of the car can not fall on the top.

Because people are on the same speed as the high-speed train when they are on the high-speed train, they are still in place even if they jump.

This is mainly related to relative motion, but also to inertia. On the high-speed rail, people will continue to move forward by inertia, and naturally there will be no relative movement.

This is because your motion is based on the vehicle, and the vehicle is your contrast, and you are moving at a uniform speed according to the vehicle, so it will not lead to such a situation.

It is because of the relatively fast speed of high-speed rail, so there is such a saying.

Yes. The air inside the carriage and the train move forward together, and there will not be much resistance to the person, while the air outside the carriage and the train are in reverse motion, and the resistance to the person is great, and the person will retreat. When the person jumps, the horizontal upward force disappears, and the person maintains the same speed as the car in the horizontal direction, so the distance between the horizontal direction and the car in the same time is the same, so it returns to the original position when it lands.

Jump up on the roof of the bullet train and jump up inside the car. It will be in its original position when it falls.

I used to jump on the flatbed of the train.

However, it can be dangerous to jump at speeds of more than 600 kilometers per hour or jump too high.

First of all, there is a clear question: whether the motor train is in a constant speed state, if it is not all this can not be discussed. Constant speed is the premise, and the landing must be in the original position after jumping up in the car at a constant speed; The roof jump is definitely not in the same position, because the air flowing relative to the EMU during the time you jump up and hang in the air will exert a force parallel to the direction of the EMU's movement, and this force will cause you to produce a displacement relative to the EMU.

The size of the displacement depends on the difference between the speed of the air and the train.

Basically, in the original position, the jump will not be very high, and the stay in the air will not be very long, even if it is in the original position, because of inertia.

China's high-speed trains are now running at 350 km/h.