Final answer:
Movements involving moving in an arc or around an axis are known as rotational movement, which includes examples like the turning of one's head and the spinning of a compact disc. This concept is pertinent in anatomy for joint movements and in physics where kinematics describe motion using angular quantities.
Step-by-step explanation:
Movements involving moving around an axis or in an arc would be classified as rotational movement. This type of motion can occur in various contexts, including anatomy and mechanics. In anatomy, rotational movement refers to the action of a bone rotating around its longitudinal axis, such as when the head turns from side to side. Medial rotation moves toward the midline of the body, while lateral rotation moves away from it.
In Physics, particularly in the study of kinematics, rotational motion refers to when points in an object move in circular paths centered around one axis. Here, two angular quantities are introduced to describe rotational motion: the rotation angle, which is the amount of rotation and analogous to linear distance, and angular variables that represent the position, velocity, and acceleration of rotating objects.
Rotational motion can be pure, as in an object spinning on the spot, or combined with translational motion, like a rolling ball. Understanding these concepts is crucial for addressing numerous questions about motion in two or three dimensions, such as with a rollercoaster or a spinning compact disc.