kenseto says...
They can change velocity and becomes inertial again. So are you saying
thatSRis not valid after an observer experienced acceleration?
He isn't saying that. Nor does he say that he is.
The usual equations ofSRare only valid if used in an inertial
coordinate
system. If you apply them to a noninertial observer, then you are not
doingSR.
So are you saying that after acceleration an observer will forever
becomes non-inertial?
He isn't saying that. Nor does he say that he is.
You really do learn to read.
When the observer and clocks are both moving inertially, then the particular
special-caseSRequations for time dilation etc that you are quoting apply.
Those equations do NOT apply during the period of non-inertial motion. SR
can still handle that case, but NOT with the equations you cite.
We are talking about the objects after acceleration.
The equations for clock ticking rates for inertially moving clocks apply
only to inertially moving clocks. They are not the same equations as for
non-inertially moving clocks.
Really ... its not hard to understand that.