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Homework Help: Relative velocity Problem

  1. May 13, 2015 #1
    1. The problem statement, all variables and given/known data
    A boat is travelling due north at 5 m/s and a passenger on boat A sees another boat, boat b, approaching from south-west (45 degrees) at a speed of 6 m/s. What is boat B's actual velocity?

    2. Relevant equations

    Vrel = Vb - Va
    3. The attempt at a solution
    http://blob:https%3A//www.physicsforums.com/1c3c6810-6d14-4b51-8001-acb8be8f9167 http://blob:https%3A//www.physicsforums.com/0f6caecc-b8ad-4208-b8cb-c8fdd9c98d28 upload_2015-5-13_21-19-6.png

    Attached Files:

  2. jcsd
  3. May 13, 2015 #2


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    Gold Member

    Is there a question in there somewhere? (I can't see the first two images you posted)
  4. May 13, 2015 #3
    Try redrawing your triangle a little differently so that the angle is 135 degrees from the horizontal. Imagine flipping your triangle upside down.
  5. May 13, 2015 #4
    Hope this helps

    Attached Files:

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