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Formula Help

  1. Oct 30, 2005 #1
    formula Help!!

    i got this question but i don;t know which formula to use

    Q - A 1m plank of Mass 1.0kg is placed on two scales which are at either end of the plank. Masses are hung underneath the plank.

    Mass A = 5.0kg at a distance of 0.30m from the left of the plank
    Mass B = 5.0kg at a distance of 0.90m from the left of the plank

    What do the scales read

    Can sumone help me!? plzz
  2. jcsd
  3. Oct 30, 2005 #2
    this is a moments of force question....you should really have a go at these questions and post what you've come up with so far then we would know whether the advice we give you is useful or not.
  4. Oct 30, 2005 #3
    Torque is essentially what you are dealing with, or the turning force. Force is calculated with F*d, or in your case, F*r because you're dealing with torque rather than force exactly.

    This is the formula you most likely need to use to solve this problem.

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