Question

In …………… an object moves about a fixed axis.

Answer 1

1. If an object moves about a fixed axis or fixed point without changing its position on the whole, then the object is said to be in rotatory motion.
2. Spinning motion of the Earth, top moving on its nail, motion of blades of a fan etc. are the examples of rotatory motion.

Hence, in rotatory motion an object moves along a fixed axis.