A plane traveling north at 200 m/s turns and then travels south at 200 m/s. the change in its velocity is 400 m/s in the south direction.
A particle or object's movement with respect to time is expressed vectorially as velocity.
The meter per second (m/s), usually referred to as speed, is the accepted unit of velocity magnitude.
As an alternative, the velocity magnitude can be expressed in centimeters per second (cm/s).
The rate of something moving in a specific direction is called its velocity. Using an automobile driving north on a highway as an example, or a rocket after it has launched, as an example of speed.
Scalar implies that the velocity vector's absolute value magnitude will always equal the motion's speed.
ΔV = V1 - V2
ΔV = 200 - (-200)
ΔV = 200+200 = 400 m/s
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