A random question about speed...

[Heskey]

If you're in a vehicle that's moving, whether it be car, train, bike, plane.... Are you moving at Xmph? Or are you simply in something doing Xmph?

If you jump off a train you don't fly forward in the train's direction; most likely you fly a few metres, hit the ground and roll a few times. Persumably you're ejected at around half the MPH of the vehicle?

Completely random question for you all to ponder over and call me an idiot for

[ewenm]

If you jump off you're "ejected" at the speed of the vehicle you were in. Air resistance slows you down and gravity pulls you down.

[eightseventhree]

you only go a few meters as there is this force called gravity

[GKP]

If you jump off the moving train you will be travelling at the same speed as the train. However, air resistance coupled with the lack of any forward energy pushing you along (in other words, an engine) will mean your speed will decrease quite quickly.
Oh, and the ticket inspector will still want you to pay full fare.

[carter711]

eightseventhree said:

you only go a few meters as there is this force called gravity

Can this force arrest you?

[Bushmaster]

It depends on whether you are sitting down or standing up. If you are sitting down in a seat fixed to the train you are going at the same speed as the train. If you are standing up you are going at different speeds.

HTH

[Digger.]

Is it true, that in a vacuum, a feather and something with more mass/weight will drop at exactly the same speed?

[Heskey]

The ejection was just an example, it's the "person speed" vs. "vehicle speed" I'm interested in.

I think I first started to wonder about this YEEEEARS ago as a kid, when I'd jump whilst on a bus and not go flying backwards; I stayed in the same place albiet in the air.

[schmalex]

Bushmaster said:

It depends on whether you are sitting down or standing up. If you are sitting down in a seat fixed to the train you are going at the same speed as the train. If you are standing up you are going at different speeds.

HTH

Huh? So, if I were to stand on a train for long enough, I would crash into the very rearmost bulkhead?

[tashie]

How weird's this?...
If a bird is flying in a train, does it have to fly with the train so that it doesn't hit the back.

It would woudln't it?

[jeff m]

Don't forget to tell one of your buddies we'll need a link to the video when you try this.

[ewenm]

Digger. said:

Is it true, that in a vacuum, a feather and something with more mass/weight will drop at exactly the same speed?

Yes. It has nothing to with the mass.

[MK4 Slowride]

Dog in vehicle going at 'Z' mph doe on ground chasing vehicle going at 'Y' mph.

Dog jumps out of moving vehicle travelling at 'Z' collides with dog travelling at 'Y' becomes 'X'.

HTH

[scorp]

at that gif

[ewenm]

tashie said:

How weird's this?...
If a bird is flying in a train, does it have to fly with the train so that it doesn't hit the back.

It would woudln't it?

No. The air in the train is moving at the same speed as the train (assuming it's not a convertible ). Think about it, if you're sitting in a train, is the air in the train rushing past you or moving with you.

[dan1981]

so is the fly that is flying around in my car at the moment doing 70mph when i am on the motorway?

[Engineer1]

It's quite simple you are travelling at the same speed as the vehicle, if there was a speed difference between you and the vehicle then you would move inside the vehicle

[ewenm]

Heskey said:

The ejection was just an example, it's the "person speed" vs. "vehicle speed" I'm interested in.

I think I first started to wonder about this YEEEEARS ago as a kid, when I'd jump whilst on a bus and not go flying backwards; I stayed in the same place albiet in the air.

Which surely told you that you were travelling at the same speed as the bus?

[Heskey]

ewenm said:

tashie said:

How weird's this?...
If a bird is flying in a train, does it have to fly with the train so that it doesn't hit the back.

It would woudln't it?

No. The air in the train is moving at the same speed as the train (assuming it's not a convertible ). Think about it, if you're sitting in a train, is the air in the train rushing past you or moving with you.

Moving with, but I would assume a bird in a moving train could fly around as it would in the open air?

[ewenm]

Heskey said:

ewenm said:

tashie said:

How weird's this?...
If a bird is flying in a train, does it have to fly with the train so that it doesn't hit the back.

It would woudln't it?

No. The air in the train is moving at the same speed as the train (assuming it's not a convertible ). Think about it, if you're sitting in a train, is the air in the train rushing past you or moving with you.

Moving with, but I would assume a bird in a moving train could fly around as it would in the open air?

Of course, the bird is stationary relative to the air in the train so can fly around as normal. What's difficult about this? If it flew out of the window it would struggle as it would suddenly be trying to go at 70mph+ through the air.