What type of motion involves movement in a circular path?

Rotary motion refers to the movement of an object around a central point or axis, creating a circular path. This type of motion is characterized by the constant angular displacement, where every part of the object moves in a circular trajectory around a fixed axis.

In various engineering contexts, rotary motion is an essential concept, particularly in mechanisms such as gears, wheels, and engines, where rotation is vital for functionality. Understanding rotary motion is crucial for designing and analyzing systems that depend on centrifugal and centripetal forces, which play significant roles in dynamics and mechanical systems.

The other choices refer to different types of motions, which do not involve circular movement; thus, they are not applicable in this context.