Physics - Motion - Class - 7 - Selina Solution - ICSE.

 9. How does rotatory motion differ from circular motion?

The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body’s Centre of mass and the axis of rotation remains fixed.

In rotatory motion, a body rotates on its own axis (passing through it) while in circular motion, anybody/particle moves on a circular path with centre outside the body.

Rotational motion is based around the idea of rotation of a body about its Centre of mass. In rotational motion, the axis of rotation and centre of mass could change whereas in circular motion, the axis of rotation and centre of mass does not change.