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Chockstone Forum - General Discussion
General Climbing Discussion
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Topic
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Date |
User
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| Maths/Physics question |
5-Aug-2005 At 2:11:46 PM |
Carniola
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| Message |
Assuming Brat’s premise of the requirement of someone of the upper body of Stallone/Arnie with massive solid fuel afterburners (a very bad chilli served up at the National Hotel) and my current cerebral state I thought long and hard.
To tackle this fantasy in the virtual world one needs to view this dyno from a number of disciplines. From these we can feed this into our computer and spit out a plausible theorem
1. biochemical- biokinetic
The muscles must have sufficient energy to do the work to achieve this feat. The driver is the release of energy from the oxidation of ATP to ADP (remember the Krebs cycle??). This incredibly efficient energy conversion however has a maximum rate limit in how fast you can activate energy in your muscles which is why we are mere mortals at the end of the day. To pull a 2m dyno one would achieve an overdose of lactose in about 5 milliseconds as a result of this ATP-ADP conversion and all muscles would lock up. Not to mention that to do this feat would require maximum conversion of ATP working inside the body of one person over one day compressed in a few hundred milliseconds..... can this be done Albert????
This superdyno(wo)man would have a seizure well before the launch clears the hold. If we break it down into a number of smaller dynos..... it would still mean an equivalent to pulling quantity 10 of 20 cm dynos or for the mortals 20 x 10 cm dynos (I’m still dreaming!) or for us fat boyz 2000 1mm dynos (possibly achieved after giving up the fat cuts with the sour cream/guacamole in order to stock up on “potential energy”)
2. physio-mechanical
Apart from ripping out all of his thoracic, arm and finger tendons, even the cartilage holding the various bones between the fingers and the arm/shoulder would experience high G forces possibly enough to rip them clean “off the bone” ...... welcome to astronaut training !!!
3. rheological
How much force on the hold???? The question should be how much extra work will I need to employ to launch my very viscoelastic bag of bone/cartilage/tendon/muscle train ? If our superdyno(wo)man were perfectly elastic then this would be easier to solve but a lot of energy would be lost because of viscous dissipation of soft tissue.... and of course this is all time and temperature dependant (i.e how fast does he/she want to launch and is this in the tropics or on a ledge somewhere in Alaska?)
4. sociological
“Why would you wanna pull a 2m dyno for goodness sakes?!” Get off the dole and get a bloody job
5. physics
There would need to be a lot of dark matter energy hidden in that superdyno(wo)man to pull off that stint. Also at 100 kg for a short-arse, he’s poking a big energy well into the space-time fabric....
6. philosophical
Well I guess I’ve given you all the reasons why I can’t give you the answer cos I’m really enjoying this 3rd bottle of shiraz but I’m still wright. Albion, however, is on the right track and needs to solve for delta t using a bit of string theory mixed in with classical quadratic and double differentiation of the equations he pontificated.
dunno |
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