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Homework Help: Swing system

  1. Aug 30, 2011 #1
    1. The problem statement, all variables and given/known data
    Your nephew Albert sits on a lightweight swing. Albert has a mass m. You pull horizontally on Albert so that the swing rope of length L maintains an angle [itex]\theta[/itex]
    with the vertical

    2. Relevant equations
    A. Write a newton's 2nd law equations for the horizontal force components acting on the system.
    B. Write a Newton's 2nd law equation for the vertical force components acting on the system.
    C. Derive an expression that would allow you to calculate the value of F if you were given m, g, L, and [itex]\theta[/itex]

    3. The attempt at a solution A. F=ma, B. F=mg. C. no clue
  2. jcsd
  3. Aug 30, 2011 #2


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    Homework Helper

    Start by drawing the free body diagram with the mass at the angle. Then try splitting the weights into 2 components, one in the direction of the string and one tangential to the mass.
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