View Single Post
Jan13-12, 10:28 PM
DaveC426913's Avatar
P: 15,319
Is there an absolute motionless?

Quote Quote by e^(i Pi)+1=0 View Post
According to General Relativity there is an absolute rest - any object that is not experiencing an acceleration. Note the equivalence principle of acceleration and gravity and realize that you sitting at the computer are not considered to be at rest, yet an object in free-fall is. To put it another way - an object can be considered to be at absolute rest when it traces a straight path through a spacetime diagram, the x,y coordinates representing spacial movement and the z coordinate representing time.
What??? No.

It would be in inertial motion. But it would not be at absolute rest. The very core of relativity is there there is no such thing as absolute. That's the relative in relativity.

What you have described is relative rest. You are at rest if you choose the right frame of reference.