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C4 vectors help please!

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AQA GCSE physics P1 unofficial mark scheme 05-05-2016
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    I am getting a bit confused on C4 vectors section, I don't really understand the difference between a skew, parallel or perpendicular vector in 3 dimensions....

    Can someone explain to me please ??
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    Parallel means the vectors are well parallel... Perpendicular means that there dot product will be zero, as they cross at 90 degrees and the cosine of 90 is zero. Skew means that they arn't parallel, and that the don't intersect.
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    Thank you very much!I get it now!
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    (Original post by cheungstar)
    Thank you very much!I get it now!
    No problem.

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Updated: June 19, 2012
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