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Circular motion of two wires and a ball

  1. Feb 25, 2005 #1
    circular motion!!!

    two wires are tied to a 200g ball. the ball revolves in a horizontal circle at a constant speed of 7.5 m/s. what is the tension in each wire.

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  2. jcsd
  3. Feb 25, 2005 #2

    Astronuc

    User Avatar

    Staff: Mentor

    The top wire must support the ball, so there will be a vertical vector force in opposition to gravity.

    The ball is rotation, so calculate the horizontal component [itex]\ifrac{mv^2}{r}[/itex]. Each wire then provides half of the centripetal force, assuming they are of equal length.

    The tension in each wire found by the vector sum of horizontal and vertical components.
     
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