Question

How does a rotatory motion differ from the circular motion?

Answer 1

(1) In rotatory motion, the axis of rotation passes from a point in the body itself whereas, in circular motion, the axis of revolution passes through a point outside the body. Thus the motion of earth around the sun is the circular motion whereas the motion of earth about its own axis is the rotational motion.

(2) In the circular and rotatory motions, the distance of a point of the body from a fixed point always remains same, whereas it is not the same in curvilinear motion.