Is initial velocity and final velocity instantaneous?
If displacement of a body is dependent on time and is written as
For sake of simplicity, many times we don't put the arrow marks at the top of these quantities but always understand these as vectors.
Now initial velocity is velocity of the body at time
and final velocity is velocity of thebody at time
These can also be written as
It may be appreciated that at any time
Value of velocity is given as
This velocity could be different from
Similarly, the discussion holds for final velocity.
Please feel free to raise any questions.