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Calculating the force in a crane

  1. Feb 8, 2013 #1
    First of all, i'm sorry for my bad language. I'm dutch and not the best in English.

    I'm doing an internship on a compagny and i'm having problems with 1 equation.
    i know the basics but this one i can not solve.

    i will draw a simple design (think of a crane)
    it has 2 bars, the horizontal bar is 2 meters and the vertical is 3 meters
    at the end of the horizontal bar there is 25 KN
    what will be the forces in the ground?

    |2................25 KN
  2. jcsd
  3. Feb 8, 2013 #2


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    Staff: Mentor

    Horizontal <-> vertical are different in the sketch and the description.
    Based on the sketch: It depends on the size of the bar and the way it is fixed on the ground. The total force is just the gravitational force from the load (25kN), but you need at least two contact points on the ground. The mass of the crane itself could be relevant, too.
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