Why if you are in a enclosed carriage on a moving train and you jump, you land in the same spot?

Question

But if the same carriage going at the same speed had no ceiling or roof and you jumped, you would land behind the spot you jumped from?

Answer 1

Because you are all inside of a closed/pressurized system and inside the same reference frame.

You're getting pushed backward by pressure from the front of the train, and being pushed forward by pressure from the back of the train. Thus, the internal forces on the train are in equilibrium. You're in the same reference frame traveling at the same speed as the train, thus have the same momentum and/or velocity (speed plus direction) as the train. So, whenyou jump, you're still traveling at the same speed the train is, just happen to also be moving up and down too.

Now, if the train was open to the outside air, and you weren't inside another enclosed system, and you umped, you might get some drag from the air moving around you, pushing you back (the same as if you were hit by wind traveling the same speed as the train but in the opposite direction and you were standing on solid, non-moving ground; this is basically equivalency of motion; whether you're moving with respect to the air, or the air is mmoving with respect to you, the net effect is the same: the pressure of the air pushes you in the direction it's moving from your point of reference).

Hopefully that all sort of made sense?

Answer 2

The reason that this happens is really quite simple. If you are standing on a platform on a train that is going some speed (lets say 15 mph) That means that you too are going 15 mph, along with everything else on the train. By jumping up into the air (assuming that you jump straight up) you are not applying any force in the opposite direction to which you are traveling. Since Newton's first law states that every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it, you will not slow down and thus land in the same spot that you jumped from.

To answer the second part of your question. The reason that you would land behind where you jumped from if there were no walls or ceiling on your train car is because of air resistance. This air resistance is appyling a force against your body, which will slow you down and cause your body to fall behind your original jumping point.

Answer 3

OK, with ceiling, the air and everything is moving at the same speed as the carriage. Nothing to slow you down. Without the ceiling you have air outside that is not moving the same speed as the carriage. The resistance offered by the air slows you speed to less than the carriages, which is why you dont land on the same spot

Answer 4

In the enclosed carriage there is no force acting on you but gravity and inertia which is the same as the carriage and you don't move backward (or forward). In a open carriage you have wind resistance pushing you when you leave the floor of the carriage so you move the opposite direction the carriage is moving. Actually it is impossible to land in the same spot twice no matter if the carriage is open or closed.

Answer 5

You are traveling in the carriage at the same speed that it is. So when you jump up, your own inertia carries you (and the bubble of air that is inside the carriage) forward with the carriage.

If you jump out of the carriage, the wind blowing around the carriage blows you backward.

Answer 6

As the train accelerates you (the person in the train) and the air around you accelerates at the same rate. When you jump youre body will still be traveling at the same speed as the train and so will the air around you. As the air speed is the sam you will not experience air resistance, so you body dosn't deccelerate and you land in the same place. If the trains spped changes in the second you're in the air then you body will fall in a diffrent place. If you are outside the train, for example on the roof then when you jump you will fall to youre untimly death.

Answer 7

Because you are moving at the same speed as the train, you are caught up in the same momentum, therefore relatively you are not moving with respect to the carriage around you. You would land on the same spot unless wind or turbulence, or sudden deceleration or acceleration kicked in while you were in the air.

Answer 8

Everything in the carriage including the air is moving at the same speed. You could try opening all the windows, though I doubt if the other passengers would be too impressed.

Answer 9

A prepare has an engine that propels it forward, we could say at a value of 60 mph, so being on the prepare you're additionally shifting at 60 mph. the instantaneous your feet go away the floor your momentum of course starts at 60 mph, although till you have an engine up your *** or in a no environment environment, you're subject to air stress/friction, so which you will decelerate. once you bounce interior the air you're up interior the air for decrease than a 2nd, so the quantity of velocity lost is slightly measurable, so once you come down that's fractionally off from the place you jumped. we could say you may bounce 50 feet interior the air without delay up you're able to lose measurable floor. even however that's extremely straightforward and comprehensive complication-unfastened sense they some how convince human beings otherwise through fact it disproves the earth rotating on the nonsensical value we are instructed it rotates at.

Answer 10

Neither ... when you jump in the enclosed space you will land slightly in back of where you were .. you do not have any propulsion like the train does and you are simply moving forward via inertia and you will loose ground slightly .... the only change in taking off the roof would be due to wind causing more drag and slowing your inertial movement quicker.