Question

What is a vector in physics?

Answer 1

1. Vector is a physical quantity that has both magnitude and direction.
2. A vector with a value of magnitude equal to one is called a unit vector.
3. Examples are linear momentum, Acceleration, Displacement, Momentum, Angular velocity and force, etc.
4. The vectors between two points A and B is given as in fig. $\overrightarrow{AB}$or vector a.
5. In fig., the arrow over the head of the vector shows the direction of the vector.
6. A unit vector is the direction vector,
7. Unit vector can be calculated by
   $$\begin{gathered} \mathrm{unit}\mathrm{vector}=\frac{\mathrm{vector}}{\mathrm{magnitude}\mathrm{vector}} \\ \hat{\mathrm{A}}=\frac{\overrightarrow{\mathrm{A}}}{\left|\mathrm{A}\right|} \end{gathered}$$