# Vector quantity question: What is unit vector?

Please explain what is this UNIT VECTOR , what is its use, how it is used and what is î, ĵ, k^?
I know the definition already: "It is the vector whose magnitude is 1" but I didn't understand what it means, how can you say that the magnitude of every unit vector is 1??
Isn't it written as A = 3î...
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Please explain what is this UNIT VECTOR , what is its use, how it is used and what is î, ĵ, k^?

I know the definition already: "It is the vector whose magnitude is 1" but I didn't understand what it means, how can you say that the magnitude of every unit vector is 1??

Isn't it written as A = 3î +6ĵ+ 4k^? then how is its value 1?

I am confused, so long explanations are better.

Thanks for answering!

I know the definition already: "It is the vector whose magnitude is 1" but I didn't understand what it means, how can you say that the magnitude of every unit vector is 1??

Isn't it written as A = 3î +6ĵ+ 4k^? then how is its value 1?

I am confused, so long explanations are better.

Thanks for answering!

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