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A vector is a physical quantity that has two components, one of amount and one of direction. Your use of the word "units" is interesting. Generally units would apply to the "amount" part of a vector. Metres, Newtons, Metres per second, for example could apply. Does this go some way to answering your question? Tell us about the context of "Vector Units".

22 February 2012

example 2: mass = not vector (it has amount). weight = vector (it has amount + direction)

25 February 2012

example: speed = not vector (it has amount). Velocity = vector (it has amaount + direction)

25 February 2012

Hi acurlyninja,
I don't know if you're still stuck on this question. A 'Unit Vector' (you've got 'vector unit' but this should still apply) is a vector with magnitude 1. If you think about the x,y plane, the vector from (0,0) to (1,0) is a unit vector as the size is =1. However the vector from (0,0) to (1,1) is not a unit vector as the magnitude is the square root of (1^2+1^2)=sqrt(2) ie not=1. To get the unit vector in this direction we'd divide both x and y part of the vector by sqrt(2). ie (1/sqrt(2), 1/sqrt(2)). does this make sense?

07 March 2012

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