Question

What are the characterstics of rotaional movement

Answer 1

Rotational motion is the motion of a body about an internal axis. In rotational motion the axis of motion is part of the moving object.
All of the properties of linear motion which we have discussed so far this year have corresponding rotational (angular) properties.Angular speed is the rotational equivalent of linear speed. To find the linear speed of a rotating object (its tangential speed) we need to multiply the angular speed by the radius.
Angular acceleration is also similar to linear acceleration.
Angular acceleration=angular speed/ time
α = ω / t

Angular acceleration is the rotational equivalent of linear acceleration. To find the linear acceleration of a rotating object (its tangential acceleration) we need to multiply the angular acceleration by the radius.

A centripetal force pulls an object towards the center of a circle while its inertia (not a force) tries to maintain straight line motion.
This interaction is felt by a rotating object to be a force pulling it outward. This "centrifugal" force does not exist as there is nothing to provide it. It is merely a sensation felt by the inertia of a rotating object