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Homework Help: Beam and Support Force Question

  1. Oct 12, 2015 #1


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    1. The problem statement, all variables and given/known data
    A 7.20m long rigid beam with a mass of 105.9kg is supported at each end. A 64.8kg student stands 1.33m from support 1. How much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.)
    Incorrect. Tries 9/10 Previous Tries https://loncapa.physics.mcmaster.ca/enc/52/7bfddd85ead53c8f14583bfd85d890dbb8c568726a65d4d6649059f2d0ac61a9b89dce375e2817b5025710e5afbd449840c9f4eb4d76711b0370f0e564254ec091780c11a4a72cd5.png

    2. Relevant equations

    Moment of Inertia

    3. The attempt at a solution
    I keep getting 826 for t1 and 847 for t2
  2. jcsd
  3. Oct 12, 2015 #2


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    Staff Emeritus
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    Homework Helper

    "Moment of inertia", whatever that means, is not how you solve this problem.

    Try writing the equations of static equilibrium for this beam, and then using them to solve for the unknown reactions.
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