where t' is the time measured by the moving observer, t is the time measured by the stationary observer, v is the relative velocity, x is the position, and c is the speed of light.
The relativistic expressions for energy and momentum reduce to the classical expressions in the limit of low speeds. where t' is the time measured by the
The Lorentz transformation can be derived from the postulates of special relativity. The transformation describes how space and time coordinates are related for two observers in relative motion. v is the relative velocity