Question

define velocity with its expression and S.I. unit​

Answer 1

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Velocity is defined as the displacement per unit time in a particular direction. its SI unit is m/s.It is a vector quantity.

Answer 2

Definition :-

Velocity is defined as the rate of change of displacement with respect to time.

Solution :-

Velocity :- V = D/t = m/s

then

SI unit :- m/s

hope it helps