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.
