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Thread: physics

  1. Sep 16th, 2002, 06:36 PM #1
    SteveCRM
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    physics

    what is the difference between vector displacement and a resultant?
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  2. Sep 16th, 2002, 06:38 PM #2
    SteveCRM
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    my problem is this:

    A plane travels 25 km at an angle of 35 deg. to the ground, then changes direction and travels 515 km at an angle of 22 deg. to the ground. Find the magnitude and direction of the planes total displacement.

    whats the displacement? the addition of the two vectors?
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  3. Sep 16th, 2002, 07:37 PM #3
    x0rx0r
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    Since a vector quantity has direction, your resultant displacement is as follows.

    In a right angle triangle, the displacement is the longest side, using pythagoras' theorem. Then, you can find the angle at which it's travelling using tan (Opp/Adj).

    I hope that helps.
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  4. Sep 16th, 2002, 08:03 PM #4
    SteveCRM
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    k thanks...the books defenition is sketchy, thanks for clearing it up
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  6. Sep 17th, 2002, 03:36 PM #5
    A$$Bandit
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    Red face

    I just started a two year A-level course on mechanics, and a physics A-level module on vectors and stuff, and BOY am I getting fed up with resolving fricking vector diagrams for 3:20 every day...
    Not at all related to sheep...
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  7. Sep 18th, 2002, 12:05 PM #6
    DavidHooper
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    Chuckle - we've all been there
    There are 10 types of people in the world - those that understand binary, and those that don't.
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