Page 84 - eEISBN FINALIZE

Known,

Arc distance AB = rѲ,

when Ѳ is rotation angle in rad.

then,

= Ѳ

Angular Velocity – is the angle exchange rate of the time

Consider the figure below - a body moving at a constant velocity on the circumference of a circle
centered at O.

B
r

O 

A


Let the a body moves starting at point A to point B by making the rotation angle  in time t
seconds, then:

Angular velocity =


 = −1

also,

 =

When N is the number of rotation per minute.

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