A rigid body is an object that does not deform or change shape when forces are applied to it. This means that the distances between any two points within the body remain constant, regardless of external influences. Common examples of rigid bodies include solid objects like cars, bricks, and metal rods. In physics, the study of rigid bodies is important for understanding motion and forces. When analyzing rigid bodies, concepts such as torque, moment of inertia, and angular momentum are often used to describe how these objects move and interact with their environment.