Re: OT - "as if" physics question

I know I’m late in the discussion but I just saw the thread now and, as a physicist, I thought I could provide some insights into this question (but no answer). One way of seing the problem is to consider only the vertical movement (equivalent to standing in an elevator going up in small steps

Re: OT - "as if" physics question

in my case, it would be more like restless cat syndrome a On 6/25/2017 1:05 PM, Alan C wrote: Restless leg syndrome? Alan C -Original Message- From: ann sanfedele Sent: Sunday, June 25, 2017 6:48 PM To: Steve Cottrell ; Pentax-Discuss Mail List Subject: Re: OT - "as if&quo

Re: OT - "as if" physics question

Restless leg syndrome? Alan C -Original Message- From: ann sanfedele Sent: Sunday, June 25, 2017 6:48 PM To: Steve Cottrell ; Pentax-Discuss Mail List Subject: Re: OT - "as if" physics question thought you'd like to know that :-) ann On 6/25/2017 12:40 PM, Steve Cott

Re: OT - "as if" physics question

thought you'd like to know that :-) ann On 6/25/2017 12:40 PM, Steve Cottrell wrote: On 25/6/17, ann sanfedele, discombobulated, unleashed: I was happy to learn that even asleep we burn calories Here here! -- PDML Pentax-Discuss Mail List PDML@pdml.net

Re: OT - "as if" physics question

> On 25 Jun 2017, at 17:16, Steve Cottrell wrote: > > On 25/6/17, Jostein, discombobulated, unleashed: > >> So if you just stand still there's no energy spent? > > Steve's Law: > > A body at rest tends to fall asleep. > > True. > I think we are now straying into the

Re: OT - "as if" physics question

On 25/6/17, Jostein, discombobulated, unleashed: >So if you just stand still there's no energy spent? Steve's Law: A body at rest tends to fall asleep. True. -- Cheers, Cotty ___/\__Broadcast, Corporate, || (O) |Web Video Production --

Re: OT - "as if" physics question

That is a complicating factor, you spend energy, whether you want to or not. If you stand still there's no additional energy spent, and my calculations may be off by an order of magnitude. I didn't bother to check my work. On 6/25/2017 7:01 AM, Jostein wrote: P.J., So if you just stand

Re: OT - "as if" physics question

On Sat, Jun 24, 2017 at 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

Re: OT - "as if" physics question

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

Re: OT - "as if" physics question

Den 25.06.2017 04.04, skrev P. J. Alling: E = mc^2 probably comes into it somewhere... Oh geez, I hope not, or else Ann is atomic powered. We all are, P.J. What we don't want is to convert Ann from mass to energy. :-) Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net

Re: OT - "as if" physics question

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

Re: OT - "as if" physics question

E = mc^2 probably comes into it somewhere... Oh geez, I hope not, or else Ann is atomic powered. On 6/24/2017 1:31 PM, Bob W-PDML 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

Re: OT - "as if" physics question

Actually, I won't be taking advantage of that caolorie burning potential increase very often, because it will wreck my knee joints and spine. as earlier mentioned, I do have sherpas ann On 6/24/2017 8:50 PM, Jostein wrote: Came to the same result as Bill on the added calories needed to bring

Re: OT - "as if" physics question

Came to the same result as Bill on the added calories needed to bring the pack up one flight of stairs. But that's just the extra energy now "stored" in the package as potential energy. A backwards trace of the energy could look something like this: To transfer the energy to the package, your

Re: OT - "as if" physics question

weight. On Sat, 24 Jun 2017 16:02:19 -0400, Ken Waller <kwal...@peoplepc.com> wrote: -Original Message- From: David J Brooks <pentko...@gmail.com> Subject: Re: OT - "as if" physics question Is it an African package or European package.:-) And are you mig

Re: OT - "as if" physics question

Thanks all you smart gents arrrgh - I answered Bob, and Jack and you hitting "reply" I just noticed all interesting answers but yours was the one I like best , if your math _is_ right - it sure FEELS like it... 10 ft celings here - no wonder I'm maintaing my relative svelt dimensions

Re: OT - "as if" physics question

On Sat, Jun 24, 2017 at 10:34 AM 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? It's 42. Actually, it's about

Re: OT - "as if" physics question

gmail.com> Subject: Re: OT - "as if" physics question Is it an African package or European package.:-) And are you migrating Dave On Sat, Jun 24, 2017 at 12:33 PM, ann sanfedele <ann...@nyc.rr.com> wrote: What is the difference in virtual weight of a pack (say, ten l

Re: OT - "as if" physics question

-Original Message- >From: David J Brooks <pentko...@gmail.com> >Subject: Re: OT - "as if" physics question > >Is it an African package or European package.:-) And are you migrating >Dave > >On Sat, Jun 24, 2017 at 12:33 PM, ann sanfede

Re: OT - "as if" physics question

Is it an African package or European package.:-) Dave On Sat, Jun 24, 2017 at 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

Re: OT - "as if" physics question

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 wrote: > > The mass of the pack doesn't change, but as you step up you are

Re: OT - "as if" physics question

There are some equations on this site, related to bicycles, but similar question. I leave it as an exercise for the reader to rearrange the terms appropriately, since I've never studied physics. https://bicycles.stackexchange.com/questions/13090/extra-power-needed-uphill-for-weight-increase B

Re: OT - "as if" physics question

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

Re: OT - "as if" physics question

Same gravity, each step up represents a sense of it's pull. J Sent from my iPhone > On Jun 24, 2017, at 9:33 AM, 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