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Torque while digging

  1. Apr 26, 2014 #1
    1. The problem statement, all variables and given/known data

    Hi!

    I want to calculate the torque acting on an arm while it is digging something. I only have the formula tau= Fxd. Anyone that know a good formula for this?

    2. Relevant equations



    3. The attempt at a solution
    tau= Fxd, where d is the length of the link. I can't go any further
     
  2. jcsd
  3. Apr 26, 2014 #2

    adjacent

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    First start with a diagram
     
  4. Apr 26, 2014 #3
    Can you explain a little more? what are the parameters? :/
     
  5. Apr 26, 2014 #4
    I guess I need the friction force between the sand and the tool
     
  6. Apr 26, 2014 #5

    rude man

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