how many?

how many PrepHoleers can solve this question? the answer might surprise you!

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  1. 1 month ago
    Anonymous

    D) Neither, because the post and arm are made of steel tube painted to look like wood, and the black sphere and chain is made of polyethylene and from picrel

    • 1 month ago
      Anonymous

      yeah but the beams are covered in burning jet fuel

      • 1 month ago
        Anonymous

        But that won't melt it

        • 1 month ago
          Anonymous

          😮

        • 4 weeks ago
          Anonymous

          But it might make it deform instead of cracking

          • 3 weeks ago
            Anonymous

            Yeah, but that doesn't explain why the one next to it cracked too.

        • 3 weeks ago
          Anonymous

          doesnt have to melt to be structurally useless

    • 4 weeks ago
      Anonymous

      >D) Neither
      That would be answer C.

    • 3 weeks ago
      Anonymous

      >black sphere

      close, but that's jigglypuff viewed from above (painted black)

  2. 1 month ago
    Anonymous

    a

  3. 1 month ago
    Anonymous

    They say that wood performs better in compression than in tension, and I believe that's true. If we assume that the joint between beam and post is unbreakable, and that the wooden beam is uniform and unbreakable *except* for those two points, then the point that's in tension (A) will break first. "First", but just barely. The failure of A will almost immediately lead to the failure of B.

    But I'm a B-gay when it really comes down to it.
    >muh hula hoops
    Please.

    • 1 month ago
      Anonymous

      >They say that wood performs better in compression than in tension
      the tensile strength of a wood beam along the axis of the fibres is much higher in tension than in compression
      however compression doesn't lead to cracks

      • 1 month ago
        Anonymous

        I mean it took like 70 years to figure out why the baseball bat breaks backwards so maybe don't get too wrapped up in the details before we even know what type of wood we're talking about.

  4. 1 month ago
    Anonymous

    c) it snaps like spaghetti into 3 pieces

  5. 1 month ago
    Anonymous

    at the knot

    • 1 month ago
      Anonymous

      >do my homework for me!
      The real life answer is this , but assuming the material is homogenous then it is most likely to break at A. Since the top of the material is in tension while the bottom is in compression.

  6. 1 month ago
    Anonymous

    >be me
    >get engineering degree
    >apply at company
    >give me mechanical aptitude test
    >hear nothing
    >put on my super charm and call secretary to pump for info
    >"so have you heard anything?"
    >"well you scored higher on the mechanical aptitude test than anyone who has ever taken it so I can't imagine they wouldn't want you."
    >feels good man
    >they never called

    knowing is the true failure. also the answer is D. it won't break if it's not already broken in this scenario. nothing is changing so it is a static system shown.

    • 1 month ago
      Anonymous

      >well you scored higher on the mechanical aptitude test than anyone who has ever taken it so I can't imagine they wouldn't want you
      that was sarcasm, anon. they were probably laughing together about your test result when you called.

    • 4 weeks ago
      Anonymous

      >mechanical aptitude test
      They don't have hard questions like "is a bicycle's right pedal left threaded?" Instead they're testing if you remember getting splashed while washing cutlery.

    • 3 weeks ago
      Prepare

      You was white, cracka.

  7. 1 month ago
    Anonymous

    wood is anisotropic but like other anons have said it usually performs better in tension, so B
    there are also shear forces in the axial and normal direction but i don't think that matters much here

  8. 1 month ago
    Anonymous

    did you know that trees naturally grow compressionwood and tensionwood, old woodcrafters used to exploit these properties to get the most out of their timber, a detail lost on modern carpentry

    • 1 month ago
      Anonymous

      in fact they now actively avoid sawn timber with reactionwood because it doesn't comply easily

    • 1 month ago
      Anonymous

      was used in bowmaking as well

  9. 3 weeks ago
    Anonymous

    There's nothing to discuss. Typical construction timber has properties of C24. It's in german but tension strength of 14 N/mm2 is a lot lower then compression strength of 21 N/mm2.

    The part of cross section in your example is the top part, the solution is A. Here is video of a four point bending test https://youtu.be/ws7eJPYda2s

    • 3 weeks ago
      Anonymous

      >Here is video of a four point bending test
      literally the opposite situation op asked for

      • 3 weeks ago
        Anonymous

        No it's not, it's bending in both cases.

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