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Tether ball problem (Forces)

  1. Oct 23, 2009 #1
    1. The problem statement, all variables and given/known data

    A tether ball leans against the post to which it is attached. The string is attached to the ball such that a line along the string passes through the center of the ball. The string to which the ball is attached has length 1.50 m and the ball's radius is 0.108 m and has a mass of 0.275 kg . Neglect any friction between the ball and the pole.




    2. Relevant equations

    F=ma
    A=v^2/r
    F=mv^2/r




    3. The attempt at a solution

    Have a free body diagram, but have no clue where to start.
     
  2. jcsd
  3. Oct 23, 2009 #2
    What is the question?
     
  4. Oct 23, 2009 #3
    Woops, sorry.

    First question: What is the tension in the rope?
    Second: What is the force the pole exerts on the ball?
     
  5. Oct 24, 2009 #4
    Start by labeling the forces on the free body diagram.
     
  6. Oct 24, 2009 #5
    Ok I got the first question figured out, need help with the second one.
     
  7. Oct 24, 2009 #6
    I had help and worked out the second part which asks what is the force that the pole exterts on the ball, and I got 0.194. But my online system doesn't accept, maybe its wrong. Can someone confirm?
     
  8. Oct 24, 2009 #7
    Work it out here.
     
  9. Oct 25, 2009 #8
    Nevermind, had my instructor explain it.
     
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