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# /diy/ - Do It Yourself

File: 91 KB, 1405x707, Screenshot 2024-06-08 132317.png [View same] [iqdb] [saucenao] [google]

how many /diy/ers can solve this question? the answer might surprise you!

 >> Anonymous Mon Jun 10 08:12:49 2024 No.2810818 File: 131 KB, 968x558, Screenshot 2024-06-10 at 10.10.28 am.png [View same] [iqdb] [saucenao] [google] This is where the axis breaks.
 >> Anonymous Mon Jun 10 10:29:28 2024 No.2810836 File: 226 KB, 970x600, f3d567ab-efc7-4a4a-bcc1-4e7640e6143c.__CR0,0,970,600_PT0_SX970_V1___.jpg [View same] [iqdb] [saucenao] [google] 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
 >> Anonymous Mon Jun 10 13:08:05 2024 No.2810864 >>2810836yeah but the beams are covered in burning jet fuel
 >> Anonymous Mon Jun 10 14:53:53 2024 No.2810885
 >> Anonymous Mon Jun 10 15:09:02 2024 No.2810894 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-fag when it really comes down to it.>muh hula hoopsPlease.
 >> Anonymous Mon Jun 10 15:27:22 2024 No.2810903 lol at people overthinking this. it's a.
 >> Anonymous Mon Jun 10 16:29:55 2024 No.2810931 File: 20 KB, 602x360, main-qimg-c93a5371ab853afa4ab13df826b48cea-pjlq.jpg [View same] [iqdb] [saucenao] [google] c) it snaps like spaghetti into 3 pieces
 >> Anonymous Mon Jun 10 17:16:55 2024 No.2810948 >>2810816at the knot
 >> Anonymous Mon Jun 10 18:11:25 2024 No.2810965 File: 154 KB, 2758x1679, trap.png [View same] [iqdb] [saucenao] [google] >>2810816>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 calledknowing 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.
 >> Anonymous Mon Jun 10 18:48:55 2024 No.2810979 >>2810965>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 youthat was sarcasm, anon. they were probably laughing together about your test result when you called.
 >> Anonymous Mon Jun 10 18:53:04 2024 No.2810980 >>2810864But that won't melt it
 >> Anonymous Mon Jun 10 19:43:58 2024 No.2810997
 >> Anonymous Wed Jun 12 23:38:17 2024 No.2811946 >>2810816>do my homework for me!The real life answer is this >>2810948, 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.
 >> Anonymous Thu Jun 13 01:51:55 2024 No.2811985 >>2810894>They say that wood performs better in compression than in tensionthe tensile strength of a wood beam along the axis of the fibres is much higher in tension than in compressionhowever compression doesn't lead to cracks
 >> Anonymous Thu Jun 13 04:50:35 2024 No.2812053 >>2811985I 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.
 >> Anonymous Thu Jun 13 14:15:20 2024 No.2812212 >>2810816wood is anisotropic but like other anons have said it usually performs better in tension, so Bthere are also shear forces in the axial and normal direction but i don't think that matters much here
 >> Anonymous Thu Jun 13 14:22:12 2024 No.2812214 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
 >> Anonymous Thu Jun 13 14:26:34 2024 No.2812215 >>2812214in fact they now actively avoid sawn timber with reactionwood because it doesn't comply easily
 >> Anonymous Thu Jun 13 15:06:36 2024 No.2812230 >>2812214was used in bowmaking as well
 >> Anonymous Mon Jun 17 07:49:57 2024 No.2813784 >>2810836>D) NeitherThat would be answer C.
 >> Anonymous Mon Jun 17 18:07:49 2024 No.2813937 File: 7 KB, 225x225, spoon.jpg [View same] [iqdb] [saucenao] [google] >>2810965>mechanical aptitude testThey 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.
 >> Anonymous Mon Jun 17 18:26:05 2024 No.2813943 >>2810980But it might make it deform instead of cracking
 >> Anonymous Sun Jun 23 00:06:28 2024 No.2816096 >>2813943Yeah, but that doesn't explain why the one next to it cracked too.
 >> Anonymous Sun Jun 23 07:46:40 2024 No.2816232 File: 375 KB, 1604x776, 1719128797368.jpg [View same] [iqdb] [saucenao] [google] >>2810816There'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
 >> Prepare Sun Jun 23 21:04:18 2024 No.2816557 >>2810965You was white, cracka.
 >> Anonymous Sun Jun 23 21:49:47 2024 No.2816573 >>2816232>Here is video of a four point bending testliterally the opposite situation op asked for
 >> Anonymous Sun Jun 23 22:21:11 2024 No.2816591 >>2816573No it's not, it's bending in both cases.
 >> Anonymous Sun Jun 23 22:37:01 2024 No.2816596 >>2810980doesnt have to melt to be structurally useless
 >> Anonymous Mon Jun 24 12:51:44 2024 No.2816872 >>2810836>black sphereclose, but that's jigglypuff viewed from above (painted black)