The problem in dealing with time is that all time measurement must be based on a standard second. At different time speed however, the measured time duration is different over 1 second.
At time speed v which is less that normal time speed c,
v.1=tv
At normal time speed, c
c.1=tc
Both v and c are velocities defined as
v,c=dxdtc
which are then velocities defined at time speed c. And so we have this relationship
cv=tctv,cv.1dtc=1dtv
Consider, the work done equation as applied to a mass m, along the time dimension.
E=∫Fvdx and that force is the rate of change of momentum
Fv=dPvdtv=mdvdtv
Notice the expression is dtv, this is to say a person will still observe the same fact that, force is the rate of of change momentum no matter what time speed he is travelling at. In order to derive a consistent expression however, we will need to change dtv to
dtc, as we observe the universe travelling at time speed c.
Till the next post.