Circular Motion 2

ROTATIONAL KINEMATICS RELATIONS

let the axis of ratation be passing through O and is perpendicular to the plane of the paper ,i.e., Z-axis is the axis of rotation.
                     

In fig(2),a plane of the rigid body that is at right angles to the axis of rotatiob is shown.We choose a partilceP in this plane .To locate this particle,we require two coordinates namely positon vector r and angle \(\theta\) ,For different particles in this plane or in the rigid body,values of r and \(\theta\) will be different.