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# Vectors

A vector is a mathematical object that has both a magnitude (size) and direction.

You can use them to represent the velocity and acceleration of a moving object, so vectors are very important in physics, engineering and mechanics. Vectors are commonly represented as line segments in two- or three-dimensional space or, more abstractly, as columns of numbers.

Tatch the video playlist below for guidance on how to work with vectors.

Click on the 3-bar menu icon in the top left of the video to navigate to different videos in the playlist.

Playlist order:

1. Scalar and vector quantities
2. Representing vectors
3. Adding and subtracting vectors
4. Vectors in component (i+j) form
5. Magnitude and direction from components
6. Finding the components and finding the resultant of two
7. Unit vectors
8. Scalar product
9. Three dimensions
10. Vector product
11. Vector product from components
12. Vector equation of a straight line
13. Parallel and intersecting lines
14. Vector equation of a plane
15. Angle between two planes
16. Intersection of two planes