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Homework Help: Acceleration Vectors! Help!

  1. Feb 28, 2010 #1
    1. The problem statement, all variables and given/known data

    A Soccer player is running down the field with a ball at a speed of 4.0 m/s. He cuts to the right at an angle of 30.0o to his original direction to receive a pass. If it takes him 3.0s to change is direction, what is his average acceleration during the turn?

    2. Relevant equations

    a = v / t


    Sin, Cos, Tan ex. Cos 45o = delta d1 / delta d2

    3. The attempt at a solution

    I have drawn the triangle In attachment.
    The dotted lines are me making the triangle.

    Then I broke the top triangle into a right angle triangle (in second attachment)

    and now I am stuck.. I have never worked with angles in this type of problem and I need help.


    Attached Files:

  2. jcsd
  3. Feb 28, 2010 #2
    Break both his old and new velocity into components.
  4. Feb 28, 2010 #3
    so when he turns to the right he will still be moving at 4.0 m/s?
  5. Feb 28, 2010 #4


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Yes, it looks like we are supposed to assume the speed is still 4.0 m/s after the turn.
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