Where, as in the case of the crank and pitman, a rectilinear motion and circular motion are coupled, there may be a loss in the application of the power to useful work, always consequent upon the ...

The object can change direction. Think about a satellite orbiting Earth – the gravitational attraction between the satellite and Earth causes the circular motion. The shape of the object can change.

Rotary Rotary is where objects or components move in a circular path or spin around a central point. Linear motion Linear motion refers to the movement of an object in a straight-line path.