Question

What is Multiple Motion?

Answer 1

When a body possesses more than one simple motion, it is called a multiple motion.
Example: You are travelling by a train. Your wrist watch is also sharing the linear motion of the train. But the hands of the watch are also undergoing rotational motion. Thus they have 2 kinds of motion, i. e. multiple motion. So also the blades of the fan in the train have multiple motion (a linear motion of the train and the rotation).

Answer 2

when more than two motions take place at the same time, it is said to be multiple motion. Eg: when a car moves, the wheels of the car undergo both rotatory motion and rectilinear motion