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Homework Help: Force Calculated

  1. Nov 6, 2008 #1
    1. The problem statement, all variables and given/known data

    Harris and Paul carry a surfboard that is 2.43 m long and weighs 155 N. Paul lifts one end with a force of 85 N.

    What part of the board should Harris lift?
    m from Paul

    2. Relevant equations
    T=Fd

    3. The attempt at a solution
    I just did 155N-85N
    =70N
    which is the amount Harris exerted,

    After getting that force I am unsure of what to use to get the "d" he needed
     
  2. jcsd
  3. Nov 6, 2008 #2

    PhanthomJay

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    Gold Member

    You're missing the eqaution for rotational equilibrium, the sum of moments about any point = 0. Are you at all familiar with moments or torques, and the calculation of their directions and values?
     
  4. Nov 9, 2008 #3
    not sure exactly?
    what would I have to do from here?
     
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