Direction is of paramount importance, specifically in mechanical experiments, as it studies the movement of a body and where it moves (taking into account the temporal variable).
In the field of physics, direction is part of the elements of movement, as it represents the line on which the moving object or body moves.
The direction of a body can vary from left to right, right to left, top to bottom, or vice versa.
If we draw an upward arrow, we say that its direction is at a 90° angle to the starting point.
The address and vectors
As mentioned earlier, direction is strictly related to movement and we can find it in the element known as the Scroll Vector.
The address is part of the vectors, so it is necessary to know exactly what they are and how they work.
It is common to confuse the direction of a vector with its meaning. The direction is simply the way the vector is going, and the meaning is where it’s going.
A clearer example of this would be:
If a train follows the right track, this will be the address.
On the other hand, if the train decides to move forward or backward on the same track, this will be taken as the direction.
A vector is a magnitude in the reference system that consists of a modulus and an address.
Vectors can be directed to cardinal points like North, South, East and West (forming a kind of cross), but at the same time it is possible for the direction of a vector to be directed to the Northeast (a diagonal line).
Vector Direction Characteristics
The direction of a vector can also be defined as a path taken by a line or any parallel line contained in a vector. There are 2 basic characteristics regarding the direction of a vector:
-The direction of the vectors is measured from the starting point to the cardinal points and their measurement can be expressed through the angle system.
-The direction of the vectors is calculated counterclockwise, from the starting point to the cardinal points. An example of this would be if the vector rotated 30°. Then it moved 30° counterclockwise.
Equations for Finding the Direction of a Vector
There are several ways to calculate the direction in which a vector is directed. Below are two of the most common ones used in physical experiments:
, where x is the horizontal change and y is the vertical change.
, where (x 1, y 1) is the starting point and (x 2, y 2) is the endpoint.
In short, the address is where the object, body, or vector goes or is located.