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Homework Help: Help with finding Tension

  1. Mar 4, 2010 #1
    1. The problem statement, all variables and given/known data
    A 0.22-kg ball on a stick is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the stick's tension is 19 N.


    2. Relevant equations
    mass m = 0.22 kg
    tension in 3'o clock position T = 19 N
    tension in 12 'o clock position T ' = T-3mg
    = 19 - 6.468
    = 12.532 N
    tension in 6 'o clock position T " = T + 3mg
    = 19 + 6.468
    = 25.468 N



    3. The attempt at a solution

    Can someone please help me understand where the [6.468] came from?
     
  2. jcsd
  3. Mar 4, 2010 #2

    You said yourself T' = T-3mg

    mg = 2.156 so 3mg is 3 times that which gives you 6.468
     
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