Question

В поезде, движущемся прямолинейно и равномерно, мальчик, развлекаясь, подпрыгивает вертикально вверх относительно пола вагона. После каждого прыжка оноказываетсяВ той же точке вагоначуть ближе к «толове» поездачуть ближе к «хвосту» поездачуть ближе к окну вагона​

Answer 1

В той же точке вагона

Answer 2

It seems like you're asking about a scenario involving a boy jumping vertically inside a train moving in a straight line at a constant speed. Let's break down the physics of this situation.

Physics of Jumping in a Moving Train:

When the boy jumps inside the moving train, his motion can be analyzed from two reference frames: the train's frame and the ground frame.

In the train's frame, the boy's motion appears vertical, and he lands back in the same spot. However, in the ground frame, due to the train's motion, the boy's motion is not purely vertical. This is because while the boy is in the air, the train moves forward, causing the boy to land slightly closer to the "front" of the train.

Explanation of the Effect:

The effect can be explained by the principle of inertia and the train's constant velocity. When the boy jumps, he conserves his horizontal velocity relative to the train. However, since the train is moving forward, the boy's horizontal velocity relative to the ground is the sum of his velocity relative to the train and the train's velocity.

As a result, after each jump, the boy lands slightly closer to the "front" of the train in the ground frame, even though he lands in the same spot relative to the train.

Conclusion:

So, while the boy may feel like he's landing in the same spot inside the train, an observer outside the train would see the boy landing slightly closer to the front of the train after each jump.

I hope this explanation helps! If you have further questions or need more details, feel free to ask.