posted on Sep, 9 2014 @ 12:35 PM
originally posted by: KrzYma
originally posted by: boncho
a reply to: KrzYma
YES, if matter counteracts the acceleration of gravity it is doing work ! It spent energy, real energy ( and not QM demons that don't want to be at
the same place at the same time)
Matter is not counteracting the "acceleration of gravity". Newton's are a measurement of force, how much force is this matter putting down. No
counteracting, no rising against such force. Just a calculation of the force.
So one of us and all the matter that makes us up, we are around 750 Newtons (168.6lbs). We are not doing anything against gravity, we are just there,
weighing that much, and our matter doesn't change. But if you were on the moon you'd only weigh 27.9lbs and you'd be exerting 124.1 Newtons of
Now if you stand up or something, you are briefly overpowering the force holding you there, to which you can make calculations about if so desired.
Matter is not counteracting anything by just sitting there.
Get it yet?
You don't get it !!
Hold something heavy in your hand, it pulls down and you have to overcome this force with your mussels.
You use energy for that, don't you ?
Put it down on the ground, it stays there but the pulling force do not stop pulling on it, or do you think gravity stops because its on the ground and
not in your hand ?
The ground counteract the pulling force of gravity, therefore energy is used..
Get it yet??
I think the science says something has to move for work to be done, or something similar. This is why when you stick a magnet to the fridge, the
magnet isn't doing any work. However, if you hold some metal above a magnet that's resting on the ground, and this causes the magnet to jump upward to
meet with the metal then I think some work was done. HOWEVER, you had to hold the metal up above the magnet for this to happen. Once they connect, no
work is being done.
I guess in some way the heat and/or convection of the deep layers of Earth's core are causing the lithosphere in the outer layers to move. I do think
the continents are "floating". So to some extent the ground we're resting on is representative of "work" being done deep in the hot convective core of
Earth. However, I don't think that means hte ground is doing any work to keep us from falling through it and plummeting to the Earth's core. We can
however tap into the energies underground using geothermal power plants.
If I rest my hand on the table and put a marble on the palm then is my hand doing work to hold the marble? Has to be no. I don't know exactly how it
works, but I know I'm not using any muscles to hold it. Lucky for me the marble doesn't crash through my hand. Somehow the "atomic" structure
(whatever that's) is holding hte marble and no work is being done. However, if I was somehow strong enough to move a 2000 lb marble onto it, it might
crash through. Fortunately, I can't hold a marble that heavy. Wonderful how nature works in our favor that way isn't it? "You can't fly too high if
you fly with your own wings" - as a general rule.
I really don't understand this stuff well. Like yourself I really don't get it. I got an "A" in ph 101, but I never went further than that because: a)
i made lots of errors and teacher forgave them b) physics is very hard and i never really GOT it c) math gets more advanced in later courses. The only
reason I passed any tests was because I memorized. Honestly I don't understand physics and I can't picture in my my mind how this world
edit on 9-9-2014 by jonnywhite because: (no reason given)