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Study23 Group Title

PLEASE, SOMEONE HELP ME! THIS IS DUE TOMORROW, AND I'VE BEEN STUCK FOR SEVERAL DAYS!!!! The first stage of a trip has a displacement vector in the negative x direction. The second stage has a displacement vector at an angle of 30 above the positive x axis. The final stage has a displacement 40 degrees below the +x axis at a magnitude of 15km. If after all three stages you end up where you started, what was the magnitudes of the displacement of the first two stages?

  • one year ago
  • one year ago

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  1. Study23 Group Title
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    This is what I'm thinking: |dw:1381891283053:dw| I was thinking that d1=a+b and d2 is the sum of vectors b and c. If I could find x/y comp of a and b, then I could add up the comp to find displacement... I need HELP though, IM STUCK!!!!

    • one year ago
  2. Study23 Group Title
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    Is there a simpler way???????

    • one year ago
  3. AllTehMaffs Group Title
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    Yah! I think this may be late, but use the ordering of the stages to your advantage. You know part 2 has to happen at the end of part 1, etc.. so |dw:1381915710776:dw|

    • one year ago
  4. AllTehMaffs Group Title
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    θ = 180- 90-30 = 60 ψ = 40 φ = 180-90-40 = 50 (θ+φ) = 110 So you have triangle ABC and then use law of sines to find side lengths (for magnitudes only) |dw:1381916712888:dw|

    • one year ago
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