The magnitude of his velocity relative to the earth.
|V|=sqrt(Vx^2 + Vy^2) = 4.87 m/s
Velocity defines the direction of movement of a body or object. Velocity is primarily a scalar quantity. Velocity is basically a vector quantity. Rate of change of distance. Rate of change of displacement.
Velocity is defined as a vector measurement of speed and direction of motion. Simply put, velocity is the speed at which something moves in one direction.
Distance traveled by the body per unit of time. It is the distance a body moves in a particular direction per unit of time. There is only size. Not only the direction but also the size.
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