Final answer:
The rotary component in rotational motion refers to the component related to circular motion such as rotation angle, angular velocity, and angular acceleration.
Step-by-step explanation:
In the context of rotational motion, the rotary component refers to the component related to circular motion. It is the rotation angle, angular velocity, and angular acceleration that are associated with circular paths. For example, when an object moves along a circular path, it experiences changes in rotation angle, angular velocity, and angular acceleration.