Are uniform motion and uniform speed the same thing?

[Bashyboy]

Hello,

I was wondering if uniform motion and uniform speed were one in the same things? Also (if they are both identical) is acquisition of perfect uniform motion plausible?

 

[gabrielbhl]

Define moviment

 

[gabrielbhl]

sorry... define motion

 

[Bashyboy]

If I were to guess at the meaning of it, I would say it is the displacement of an object from a particular frame of reference.

 

[Doc Al]

Are you trying to distinguish uniform velocity from uniform speed?

 

[BruceW]

No, I think he's asking what uniform speed and uniform motion mean.
And in answer, I'd say yes they are the same thing.
The only place I've heard the term 'uniform motion' mentioned is by Albert Einstein, in which he uses it to mean the same thing as uniform speed (if I read it correctly).

 

[BruceW]

Oh, wait. Actually, I think uniform motion means uniform speed in a straight line.
So, yes I guess uniform motion means uniform velocity.

 

[Doc Al]

No, I think he's asking what uniform speed and uniform motion mean.
And in answer, I'd say yes they are the same thing.
The only place I've heard the term 'uniform motion' mentioned is by Albert Einstein, in which he uses it to mean the same thing as uniform speed (if I read it correctly).

I'd say that when Einstein speaks of uniform motion, he means uniform velocity, not just uniform speed.

 

[BruceW]

Yes, sorry I realized I got that wrong :(

 

[BruceW]

and about "is acquisition of perfect uniform motion plausible":
In classical physics, this is what happens when there are no forces on an object, so in principle it is possible, but practically, you'd only be able to do it approximately.
But, due to general relativity, a uniform reference frame is not required for the laws of physics to work, so you don't need to worry about whether perfect uniform motion can be practically achieved.

 

[Bashyboy]

Well, thank you very much everyone, I appreciate your insight.