If you were traveling in a spaceship that had a velocity JUST under light speed...

[CombustionMan]

If you were in a spaceship that was traveling JUST under light speed & you ran forward towards the front of the
Spaceship, what would happen? I'm talking literally JUST under c, like 0.999999999999999999999..
...999c.
Since it's impossible for someone to be moving at light speed, and he would be to an outside observer, what would happen with time/length to prevent that from happening? There's already heavy time dilation on the occupants of the ship so I was wondering what would happen to the sprinter

[tiny-tim]

Hi CombustionMan! :smile:
Since it's impossible for someone to be moving at light speed, and he would be to an outside observer …

No, he wouldn't … see http://en.wikipedia.org/wiki/Addition_of_Velocities_Formula :wink:

[Matterwave]

Because of the time-dilation that an outside observer sees, he would see the sprinter as running very very very very slowly...such that the sprinter's speed (relative to the rocket) plus the speed of the rocket (relative to the outside observer) in the outside frame is still less than c.

[CombustionMan]

Ok, makes sense. So from the runners point of view would he appear to be running normally or slowed

[jtbell]

He wouldn't be able to tell whether his ship was moving at all, without "looking outside" through the windows or whatever. Just like when you're flying in an airplane you don't notice that you're moving except when you look out the window or your plane hits an air pocket or something.