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Math Help - Simple Vector question

  1. #1
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    Simple Vector question

    Hi i have a vector question which i answered but i am not sure if it is correct.
    If possible can anyone give the question a try?

    Thanks for your time everyone!
    Attached Thumbnails Attached Thumbnails Simple Vector question-question-8.png  
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  2. #2
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    Quote Originally Posted by mathematicallyretarded View Post
    Hi i have a vector question which i answered but i am not sure if it is correct.
    If possible can anyone give the question a try?

    Thanks for your time everyone!
    1. Your answers are (nearly) correct! The use of the equal-sign at (ii) is definitely wrong.

    2. Your result at (ii) can be simplified a little bit:

    \vec u = \frac1{\sqrt{80}} (4i - 8j) = \frac1{\sqrt{5}}(i-2j)
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  3. #3
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    Quote Originally Posted by earboth View Post
    1. Your answers are (nearly) correct! The use of the equal-sign at (ii) is definitely wrong.

    2. Your result at (ii) can be simplified a little bit:

    \vec u = \frac1{\sqrt{80}} (4i - 8j) = \frac1{\sqrt{5}}(i-2j)
    Ah yes i see it haha. Thanks for the pick up on that one!

    Great it's good for my confidence to get them right on my own.

    Off to do more now.

    Thanks all!
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