Unit vectors and engineering notation | Two-dimensional motion | Physics | Khan Academy

Using unit vectors to represent the components of a vector. Created by Sal Khan.

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

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[johnkim]

The more tangible, the more intuitive.

[ChessNetwork]

Sal is a first class example of the phrase "Knowledge is Power".

[varex]

This guy makes explanations seem so easy...

[Hino_]

Very clear explanation. Thankyou Sir Sal!

[shodanxx]

why is the second vector unit often omitted ?

I mean, I often see vectors represented as 5*sqrt(3)î+5

why do people often drop the ^j ?

[stavrospod]

I was trying to find and explanation for that like 3months! Finally! I learned what a unit vector is! Thanks!

[pokeanalysis]

sal you are an amazing teacher I study in the seventh grade and really understand what you say and have now understood the concepts behind these various vectors

[frassmicce]

knowledge is potential power but sal uses it wisely

[ChessNetwork]

@HabeKeinMitleid I don't doubt it at all. :)

[saveUyghurs]

6:41 Don't you have to use pythagorean  to find the total? Not just add them?

[DreamFreeFPV]

Hey do you have any more videos on structural engineering?