The results are in! Although a majority said (a), for this particular setup, (b) jumps higher.
This is NOT a general rule in biological jumpers, and is particular to how we've set up the problem (notably, no force-velocity relationship) #biomechanics
All that matters is the amount of work done by the muscle. Since there is no force-velocity relationship, the work done is proportional to the shortening distance. Case (b) wins because the larger in-lever allows the muscle to shorten more
We have an intuition that (a) should be better because biological jumpers look like that. But this is to accommodate power-velocity relationships in muscle, which this setup doesn't have.
My intuition was initially drawn to (c), but the physics clearly show (b) as the winner here. A good reminder to check model assumptions!
If anyone has a good real-world example analogous to this setup, let me know! Force-velocity is pervasive, though
Is it better to jump with a long foot or short foot?
The cases below only differ by whether the in-lever or out-lever is bigger. Which will jump higher?
Ignore contraction dynamics & imagine the body is constrained to go straight up.
Answer and discuss below 👇 #biomechanics
My #SICB2023 poster and video presentation on animal #locomotion and passive dynamic #robots are up on SICB+! Head to the meeting website to check them out
8 wheels = 96 "legs" to bring to #SICB2023 Keep your eyes out for the passive dynamic walkers on Thursday 👀
This is something I never considered before, but is a great use case for Dall-E and #AI generated art: as a resource for conceptual diagrams in papers.
Most of us researchers see how beautiful art can sell our research visions but lack artistic skills. These tools could help level the field somewhat.
(Figure from https://arxiv.org/abs/2210.11449)
Having too much fun #3dprinting at work. A billion points if you can guess what this is supposed to be
#Introduction I'm a postdoc working at the Structure and Motion Lab at the Royal Veterinary College. British-Canadian, husband and father of four amazing children. I'm into comparative #biomechanics and #robotics, building a career at the interface of the two. Also looking for ways to contribute to #greenenergy. #DisabledinSTEM with #adhd and anxiety. Tell me about your #coolbugs #coolrobots and #weirdanimals
Postdoc at Structure and Motion Lab, Royal Veterinary College. Biomechanics, animals, robots. Husband and Father of four. Opinions my own. (He/Him) http://dtpolet.com
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