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Homework Help: Vector resultants? please help

  1. Aug 31, 2007 #1
    vector resultants??? please help...

    1. The problem statement, all variables and given/known data

    go 83.9 paces at 188 degrees

    turn to 128 degrees and walk 199 paces

    then travel 73 paces at 179 degreess

    find the magnitude of the resultant displacement from the starting point, answer in units of paces.

    and what is the direction of the resultant displacement? use counterclockwise from due east as the positive angular direction between the limits of-180 degrees and +180 degrees. answer in units of degrees.

    2. Relevant equations

    3. The attempt at a solution

    i have found the x components to be all in teh west direction with the values being
    i got these by takin the distance times the cos of the angle
    a to b = -83.9
    b to c = -122.52
    c to d = -72.989

    with the resultant being 279.409 west

    y components
    i got these by taking the distance times the sin of the angle
    a to b = -11.68 south
    b to c = 156.87 north
    c to d = 1.27 north

    not sure what the resultant comes to???? please help

    once i get both resultants correct i use the pythagorean theorem to get the reultant for the distance from a(starting point) to d (ending point) correct?
    Last edited: Aug 31, 2007
  2. jcsd
  3. Sep 1, 2007 #2
    Yeah... what youre doing is correct. -11.68 south is equal to 11.68 north. That should help. Do what you did earlier.
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