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Homework Help: Dumbbell Counter Weight Calculation

  1. Nov 5, 2011 #1
    1. The problem statement, all variables and given/known data

    Hi all, First post so please go easy :smile:

    I am designing a Dumbbell support that presents the Dumbbell to the user in the correct exercise starting position (1. Shown on the image.) . The problem I am facing is the counter balance to the support. The Dumbbells range from 15kg-90kg and I assume the counterbalance has to match. My question is would it be possible to use an adjustable support (2. Shown on the image.) and what calculations would I need to calculate this?

    2. Relevant equations

    I would assume I need counter balance and pivot equations but I have no prior knowledge of this.

    3. The attempt at a solution

    Unsure, as stated no previous knowledge.

    Any information or help would be greatly received,

    Thank you in advance,

    Attached Files:

    Last edited: Nov 5, 2011
  2. jcsd
  3. Nov 5, 2011 #2


    User Avatar

    Staff: Mentor

    You'll want to investigate the concepts of moment arm, torque.
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