Velocity is found to be the current speed of momentum through a vacuum. We can measure the velocity in a time t, using the following equation:
V=delta x/delta t
In any standard course of physics, you will learn that the velocity and momentum of matter can be summed up using the equations of motions. We use the same equations everyday in physics to determine particle velocities to planetary orbital references.
The equations of motions are given as a series or collection of equations, some linear, others not. The acceleration formula is given as:
A=delta v/delta t arrow a=v – u/t
And the average velocity given to a system is found through the application of:
½=(u+v) = s/t
Where u is the initial velocity, s is the distance traveled, v is velocity and a is the constant acceleration.
We learn in relativity that acceleration is the equivalence of a body with mass, and a body of mass was equivalent to curvature, and curvature was the equivalence of gravity. Lorentz equations describe a moving body accelerating through spacetime and experiencing time dilation. Space contracts and time dilates by a factor of √(1-v2/c2). In such situations, and observer can experience time moving slower accelerating through spacetime, reaching speed a fraction that of lightspeed c.