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Homework Help: Vectors and displacement

  1. Sep 13, 2010 #1
    Hey guys I'm lost with this word problem.
    A roller coaster moves 85m horizontally, then travels 45m at an angel of 30.0° above the horizontal. What is its displacement from its starting point?

    I started out by drawing a 85m line. But now I'm confused because I have to set a 30 degree angle. Would I draw a line to the northeast or northwest?

    That's all the need I'll need for now. Thanks guys!
  2. jcsd
  3. Sep 13, 2010 #2
    You would draw it NorthEast, or 3 o'clock angle, or 30 degrees, or Up-Right, etc. From there, you can find the total displacement from starting point (assuming you can see the triangle).
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