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Homework Help: Simple kinematics problem

  1. Dec 5, 2007 #1
    1. The problem statement, all variables and given/known data
    So the problem says that three turtles starts to move each from a vertice of a equilateral triangle with a constant velocity v as shown in the pic. They move towards each other ( the first one moves towards the second the second towars the third and so on ). It asks: When they are going to collide?

    http://img337.imageshack.us/img337/1038/77228846fl6.jpg" [Broken]

    2. Relevant equations
    none


    3. The attempt at a solution
    all my tries were unsuccessful thats why im asking for help ;p

    tips are welcome
    thanks in advance
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Dec 5, 2007 #2

    dst

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    Never. I don't see why they should.
     
  4. Dec 5, 2007 #3
    I forgot to mention that they're not going stay moving only on the triangle path, sorry.
     
  5. Dec 5, 2007 #4

    Shooting Star

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    Homework Helper

    Calculate the change of area A of the triangle as a function of time, and then solve for t when A=0.

    If each has moved dx in time dt with speed v, what's dA/dt?
     
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