Answer:
When the velocity of a body changes at a non-uniform
rate, its average velocity is found by dividing the net displacement covered by
the total time taken.
i.e.
Average velocity\[\text{=}\frac{\text{Net}\,\text{displacement}}{\text{Total}\,\text{time}\,\text{taken}}\]
In case the
velocity of a body changes at a uniform rate, then the average velocity is
given the arithmetic mean of initial velocity and final velocity for a given period
of time.
i.e..
Average velocity
\[\text{=}\frac{\text{Initial}\,\text{velocity+final}\,\text{velocity}}{\text{2}}\]
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