Question

explain pure rolling motion??

Answer 1

Toppling at each point on the surface where the body is moving, no sliding!

Answer 2

In a pure rolling motion, the point of contact with the surface has got velocity = 0 (istantaneusly)
the force of friction does zero work, and the velocity is in absolute value \[V=\omega*r\]
So in a pure rolling mot. linear velocity, and angular velocity are linked by that relation,
to explain in a intuitive way: the cilinder/sphere/disc does a complete rotation only after travelling a distance equal to the circumference.
(sorry for my bad english...)