A rotational system refers to a physical system where objects rotate around a central point or axis. This can include simple systems like a spinning top or more complex ones like the Earth rotating around its axis or the Moon orbiting the Earth. The motion in these systems is often described using concepts such as angular velocity, torque, and moment of inertia. In rotational systems, forces can cause changes in motion, similar to linear systems. For example, applying a force at a distance from the axis of rotation generates torque, which can change the object's rotational speed. Understanding these principles is essential in fields like mechanical engineering and physics.