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All parts of a moving body have the same angular velocity in pure rotation motion .
Angular velocity , ω , is a vector quantity
If you curl your fingers of right hand in the sense of rotation , thumb will give direction of angular velocity . o o
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v = ω x r
ANGULAR ACCELERATION is given by rate of change of angular velocity with respect to time .
α = dω / dt
Torque & Angular Momentum o The rotational analogue of force is moment of force ( Torque ). o
If a force acts on a single particle at a point P whose position with respect to the origin O is given by the position vector r the moment of the force acting on the particle with respect to the origin O is defined as the vector product t = r × F = rF sinΘ