Question

Give the meaning of Vector , Magnetude scientifically?

Answer 1

Vector means a physical quantity which mUST have magnitude , direction and must follow the triangle law of vector addition. This is called vector.
magnitude is nothing but a speed or for this chapter we can simply say it is a length.

Answer 2

In physics, speed is a pure scalar, or something with a magnitude but no direction --such as 5 m/s. ... It gives us no clue about the direction. All that we know from the speed is the magnitude of the movement. On the other hand, velocity, in Physics, must be expressed as a vector with both a magnitude and a direction.