Rotational mechanics is a branch of physics that deals with the motion of objects that rotate around an axis. It involves concepts such as angular velocity, angular acceleration, and torque, which are essential for understanding how forces affect rotational motion. Objects like wheels, discs, and planets can all be analyzed using these principles. In rotational mechanics, the moment of inertia plays a crucial role, as it measures an object's resistance to changes in its rotation. The equations governing rotational motion are analogous to those of linear motion, allowing for a deeper understanding of how forces and torques influence the behavior of rotating systems.