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Homework Help: Suspended mass

  1. Jun 11, 2007 #1
    A ruler is suspended from point x. When a mass is put at point y the mass at x is heavier than when it is at point p.
    Why is it that when the mass is moved closer to x the mass at x decreases?
  2. jcsd
  3. Jun 11, 2007 #2
    do you mean force?
  4. Jun 11, 2007 #3
    I did not understand the question properly.
    You mention that the ruler is suspended from the Point X which is the leftmost point then what effect will the mass have when it is put at the suspension point.

    Just to put it into perspective.
    [tex]\tau =rXF[/tex]
    So at X the value of r is nil.
    Last edited: Jun 11, 2007
  5. Jun 11, 2007 #4
    Sorry Tau=rXf
  6. Jun 11, 2007 #5
    yes which means the force at y is zero but the force at x is max
  7. Jun 11, 2007 #6
    Thanks for the help but what I really wanted to know was why t=r x f. I can understand that the torque increases when the force is increased but why is it that when r increases the torque increases?
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