Question

Define speed and vector.

Answer 1

Rate at which person or thing moves or operates or is able to move or operate is called speed .

quantity having direction as well as magnitude
is called vector.

Answer 2

Velocity is an important concept in kinematics, the branch of classical mechanics that describes the motion of bodies. Velocity is a physical vectorquantity; both magnitude and direction are needed to define it. ... For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector.