You have defined why one would tire when walking if each step represented a lift rather than that required on a level surface.
J Sent from my iPhone > On Jun 24, 2017, at 10:31 AM, Bob W-PDML <[email protected]> wrote: > > The mass of the pack doesn't change, but as you step up you are having to > lift with each leg in turn your own mass plus the mass of the pack, which you > are not having to do, to the same extent, when you walk on level ground, so > you are using more energy. > > To convert it to additional weight I suppose you have to work out how much > extra weight would require the same energy over the same distance on level > ground. > > E = mc^2 probably comes into it somewhere... > > Whether it stresses the body in the same way would be something else though, > because the biomechanics of carrying it upstairs are different to those of > carrying it on level ground. > > My answer would be to order a Sherpa... > >> On 24 Jun 2017, at 17:34, ann sanfedele <[email protected]> wrote: >> >> What is the difference in virtual weight of a pack (say, ten lbs) being >> carried bys omeone walking on level ground and the same person carrying >> the same pack up a flight of stairs? >> >> I'm sure I'm not using the corrrect terms here, I"m sure but I'm looking for >> the as if.... related to the stress it puts on my body. >> >> Is it like I'm carrying 5 more lbs? 20 more lbs? etc >> >> answer ON list so ten people don't have to respond :-) >> >> thanks, guys >> >> ann >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
