P.J.,
So if you just stand still there's no energy spent?
E = 2.268 kg x 9.81 N/kg x 0 m
:-)
Jostein
Den 25.06.2017 05.25, skrev P. J. Alling:
I don't think that the comparison works, exactly. The amount of energy
required to lift 5lbs 7 inches (about the height of a stair step), is
pretty simple math but does involve knowing the energy needed to
overcome the acceleration due to gravity in Newtons per kg, which, I
looked up, (you don't think I know this stuff off the top of my head),
and convert pounds to kilograms and height to meters, but then all the
terms just drop out and I can look up the values.
E = 2.268 kg x 9.81 N/kg x .1758 m
E = 3.9114 joules or if converted into food calories 9.3482 x 10^-4.
Which is less than the calories you'd get from eating a stick of
celery. Assuming 15 stairs in a flight, about 9 feet between floors, I
get .014 additional calories to climb a flight of stairs, with the extra
5 pound burden, assuming I did the math right.
However the actual stress on your body should be the same as just
holding the extra 5 pounds and walking on the level, unless you've
managed to somehow achieve multi g accelerations.
If you're having trouble getting enough oxygen it might feel like the
extra 5 pounds gains weight while you're climbing stairs.
On 6/24/2017 12:33 PM, ann sanfedele 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
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