Four-Momentum

Four-momentum is a physics concept combining an object’s energy and momentum into a single, four-dimensional quantity used in relativity. It includes three components for how fast an object is moving in space, and a fourth component related to its energy (including its rest mass and motion). Think of it as a four-dimensional vector that stays consistent across different views of space and time, helping physicists describe how objects move and interact at high speeds, especially near the speed of light. It’s essential for understanding particle collisions and the behavior of objects in relativistic physics.