Speed plus the direction of travel.
Because that is the definition of velocity
Decrease in of velocity
Average Velocity is displacement over total time.
No. The definition of 'acceleratiion' is 'any change in velocity'.
Zero, by definition. "Terminal velocity" implies that the velocity no longer changes.
No, velocity is by definition just a rate of movement that is a scalar quantity.
No. The definition of acceleration is change in velocity.
Speed and acceleration.
Force
In physics, velocity is the measurement of the rate and direction of change in the position of an object.
The official definition for the word group velocity is "the speed at which the energy of a wave travels."
Velocity can only be measured in relation to some specified point of rest, so there is no such thing as absolute velocity. All velocity is relative.