Velocity of an object is defined as the time rate of change of displacement of the object. It is defined as the speed of an object in a given direction.
Velocity is a vector quantity, as it has both, the magnitude(speed) and direction. The velocity of the object can be positive, zero and negative. according as its displacement is positive, zero or negative.
The unit of velocity is cm/s in cgs and m/s in mks systen or SI. The dimensional formula of velocity is
Types Of Velocity
(a) Uniform Velocity. An object is said to be moving with a uniform velocity if it undergoes equal displacement in equal interval of time, howsoever small these intervals may be.
(b) Variable velocity An object is said to be moving with a Variable velocity if it undergoes equal displacement in unequal interval of time or unequal displacement in equal intervals of time or changes direction of motion while moving with a constant speed.
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