What Is Vector Physics?

A plane vector is a quantity that has both direction and magnitude in a two-dimensional plane. It is also called a vector in physics. The opposite is a quantity (scalar) with only size and no direction. A plane vector is represented by a small arrow above a, b, and c, or it can be represented by the starting and ending letters of a directed line segment representing the vector.

The term vector (vector) as modern mathematics-physics

Directed line segment: A line segment with a direction is called a directed line segment. A directed line segment with A as the starting point and B as the end point is recorded as

.

Vectors, like quantities, can also be calculated. Vectors can participate in a variety of operations, including linear operations (addition, subtraction, and number multiplication), quantity products, vector products, and mixed products.

When introducing the nature of the operation, the following rules will be unified: Arbitrarily take two points A (x ₁ , y ₁ ), B (x ₂ , y ₂ ), and C (x ₃ , y ₃ ) on the plane.

• A point O in the triangle ABC, OA · OB = OB · OC = OC · OA , then the point O is the vertical center of the triangle.

• If O is the outer center of triangle ABC, and point M satisfies OA + OB + OC = OM , then M is the perpendicular center of triangle ABC.

• If O and triangle ABC are coplanar and satisfy OA + OB + OC = 0 , then O is the center of gravity of triangle ABC.

• Three points collinear : Three points A, B, C collinear launch OA = OB + a OC ( + a = 1)

• There is a point O in the plane triangle ABC, then S BCO * OA + S ACO * OB + S ABO * OC = 0