Rigid body dynamics is a branch of mechanics that deals with the motion and forces of solid objects that are considered to be rigid, meaning they do not deform or change shape under applied forces. It involves the study of how these objects move and interact with each other in both linear and rotational motion. Rigid body dynamics is essential in fields such as engineering, robotics, and physics, as it helps to analyze and predict the behavior of mechanical systems and structures. Researchers in this area often use mathematical models and principles of classical mechanics to study the motion, stability, and control of rigid bodies.