Things you've always wanted to know an answer to...

[Cricko]

Heres another.

If I am standing inside a train and I jump up in the air when I land I in the same spot on the floor.

However if I am on the roof of the train and jump up when I land I am in a different spot on the roof. ( I think)

Is this solely down to wind forces etc or not?

I am sure somebody will pop up the the scientific version of this...but in the first instance you are part on the train as it moves along..in the second instance you leave the train albeit it for only few moments and it carries on without you.

That's my theory anyway.

 

[osymandus]

Heres another.

If I am standing inside a train and I jump up in the air when I land I in the same spot on the floor.

However if I am on the roof of the train and jump up when I land I am in a different spot on the roof. ( I think)

Is this solely down to wind forces etc or not?

Its an example they use for spatial relativity ? I think Cyril may know this better ;)

 

[MK Shrimper]

Heres another.

If I am standing inside a train and I jump up in the air when I land I in the same spot on the floor.

However if I am on the roof of the train and jump up when I land I am in a different spot on the roof. ( I think)

Is this solely down to wind forces etc or not?

It's kinetic energy I believe, you have the same forward momentum as the train therefore you land in the same spot. Wind forces may move you 0.01mm backwards I suppose but nothing noticeable to the naked eye.

** waits to be shot down in flames **

 

[Swiss Tony]

Who put the bop in the bop do wop de wop?

 

[John Cena]

I love my wife more than anything in the world and she gives me the horn and I love sex with her. But when I play football at a weekend and we have a shower afterwards I can't help but look at other men's penis's does that make me a batty boy?

 

[MK Shrimper]

I love my wife more than anything in the world and she gives me the horn and I love sex with her. But when I play football at a weekend and we have a shower afterwards I can't help but look at other men's penis's does that make me a batty boy?

Next question?

 

[OldBlueLady]

might be more due to c. 21k posts

I am more than definitely sure that if you discounted the stuff from my first couple of years that my ratio of posting in the last year is a lot less than yours! :p

 

[Hotman]

I am more than definitely sure that if you discounted the stuff from my first couple of yearssince the live chat clique was disbanded that my ratio of posting in the last year is a lot less than yours! :p

back at ya nan! :p :p

 

[Perth Bambi]

Come on then clever people, why when I've just had my gallbladder removed am I getting pain in my right shoulder?

The internal organs and brain don't have their own sensory pathways so the brain gets a bit confused about what it is feeling and gets mixed up with other sensory pathways in the body such as skin and muscles etc.

 

[TrueBlue]

If you are born on a leap year on 29th of feb what day is your birthday next year?

 

[osymandus]

I love my wife more than anything in the world and she gives me the horn and I love sex with her. But when I play football at a weekend and we have a shower afterwards I can't help but look at other men's penis's does that make me a batty boy?

No actually its natural , your comparing yourself to other males , we're you an ape you would square off and possible engage in some none erotic fisty cuffs or more likely shouting and beating of chests, and then go away and shag the nearest female ..

 

[Mad Cyril]

It's kinetic energy I believe, you have the same forward momentum as the train therefore you land in the same spot. Wind forces may move you 0.01mm backwards I suppose but nothing noticeable to the naked eye.

** waits to be shot down in flames **

Consider a train moving forwards at 100km per hour.

All the passengers are also moving forwards at 100km per hour as is all the air within the train.

When you jump inside the train the only force acting on you is the force of gravity. There is no force acting on you slowing you down relative to the train so you land in the same place.

On the roof of the train you are still moving at 100km per hour but the air around you is stationary. Before you jump the force required to move you through this stationary air is provided by friction (your feet on the roof of the train). These forces balance eachother so you remain standing in the same spot on the trains roof.

When you jump the frictional force is removed and there is a net force in the opposite direction to which the train is travelling (viscous drag as you move through the stationary air).

As a result of the work this force does on you you land further down the train from where you took off.

Osymandus - Einsteins special theory of relativity was illustrated by a gedanken experiment (thought experiment) involving simultaneous lightning strikes being observed by a passenger on a train - this is nothing to do with the phenomena described by DTS and his train surfing.

 

[Mad Cyril]

I love my wife more than anything in the world and she gives me the horn and I love sex with her. But when I play football at a weekend and we have a shower afterwards I can't help but look at other men's penis's does that make me a batty boy?

Yes. Most men would leave the shower early, steal his iPhone and wallet and then take the **** with his can of Lynx.

 

[Rob Noxious]

What the f**k was Norman Hunter playing at in 1974 at wembley vs Poland ??

That game was in the Autumn of '73. I think he was trying to take it off the striker then pass it, instead of biting legs and putting it into Row ZZ. Poland showed what a good side they were in the '74 World Cup by coming third. Didn't save Sir Alf's job though or stop Norman's son from asking him (the next morning), "Daddy - why have you lost us the World Cup?" :'(

 

[osymandus]

Osymandus - Einsteins special theory of relativity was illustrated by a gedanken experiment (thought experiment) involving simultaneous lightning strikes being observed by a passenger on a train - this is nothing to do with the phenomena described by DTS and his train surfing.

Thanks for that i knew there was a train example i just couldn't remember if it was related to movement in time and space or just perception ;)

 

[MK Shrimper]

As a result of the work this force does on you you land further down the train from where you took off.

But surely as I said, nothing noticeable to the naked eye.

 

[Mad Cyril]

But surely as I said, nothing noticeable to the naked eye.

I would expect there to be a noticable difference between the inside and outside train landing positions if the train was moving at 100kmh

 

[Rob Noxious]

Odds & Sods

But surely as I said, nothing noticeable to the naked eye.

"It all looks fine to the naked eye, but it don't really happen that way at all ... no, no, no..." (The Who, 'Naked Eye')