There is a second fundamental point in physics(science) , named as Direction…—” NO TWO PERSONS CAN SEE AN OBJECT(BODY) EXACTLY EQUAL(SAME), because it’s magnitude varies due to angle of sight ‘θ’ . That is known as direction . In general the directions are Left, Right, Up , Down, Front, Back, East, West, North, South, + , – , opposite, inverse, angle …….
example: The screen appear in movie theater is different for all viewers.—- angle of sight varies
Due to this , all the physical quantities corresponds to an object is categorized into two parts, those are scalar and vector.
