Question

What is meaning of
Velocity
Acceleration
Initial position
And
There SI unit ​

Answer 1

Velocity is a vector quantity that refers to the rate at which an object changes its position. It is a vector expression of the displacement that an object or particle undergoes with respect to time. The SI unit of velocity is meter/second.

In physics or physical science, acceleration (symbol: a) is defined as the rate of change (or derivative with respect to time) of velocity. It is thus a vector quantity with dimension length/time². In SI units, acceleration is measured in meters/second² using an accelerometer.

When an object moves along a straight line, its starting position can be defined as the origin, O. ... This change in position is a distance. The SI unit of displacement and distance measurements is the meter (m).