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Homework Help: Force Question

  1. Oct 23, 2005 #1
    3 astronauts propelled by jetpacks are pushing a 120kg asteroid, exerting the forces shown:

    http://img463.imageshack.us/img463/1194/phys39at.png [Broken]

    Find the acceleration in unit vectore notation!

    So Far i have:

    F1+F2+F3 = ma
    F1=(32N)i(cos30) , (32N)j(sin30)


    F3=(41N)i(cos60) , (41N)i(sin60)

    do the math and....

    0.818m/s(i) - 0.163(j) = a

    Is this correct?
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Oct 23, 2005 #2
    Assuming the directions of the forces are outward,
    F2= 55 i according to your diagram.
    For F3, you should use an angle of 360-60=300 degree.
  4. Oct 23, 2005 #3
    i meant it to be -60 degrees
  5. Oct 23, 2005 #4
    the numerical answer is correct, but the unit is m/s^2.
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