Objects and stationary observers

[Dx]

Hiya!

An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The width and length of this object, as measured by a stationary observer is what?

Can anyone gimme more insight on this problem. I am having difficulties understanding just what the hell they are talking about.
does the width approach zero while the length approaches infinity.
Dx [zz)]

 

[STAii]

Only the dimension in which motion is will change, that is length.
It will get smaller by the factor Sqrt(1-(v²/c²)).
So :
L_{seen by observer}=L_original*sqrt(1-(v²/c²))

Of course, if you wait for an expert to confirm this it would be better.

 

[Dx]

Ok! Just to make sure I am on the right track then. The width does not change but the length approaches zero because a length of an object is measured to be shorter when its moving relative to the observer than at rest.

Yeah? I think I finally got it.

Dx