and it feels like gravity, and so earths gravity is like a constant acceleration, then what are we accelerating away from?
Could it be other galaxies?
Could be creating more space between galaxies?
2007-11-02 13:42:37 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
eri we don't KNOW what dark energy is......
maybe I'm on to something?
2007-11-02 13:55:20 · update #1
I haven't read the first question, but Earth's gravity isn't "like a constant acceleration", it's a FORCE that CAUSES constant acceleration. The weight you feel as you stand (and are probably not even aware of, most of the time) is you accelerating towards the Earth. It's just theat the ground is in the way.
A body will stay moving at the same velocity if no force acts on it. If a rocket is accelerating, it feels like gravity to an occupant because they are, in effect, being accelerated toward the back of the rocket at that rate. The only thing you're accelerating away from is the state of inertia that you were in before the acceleration started.
2007-11-02 17:31:31 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Just because it feels like acceleration does not mean it IS acceleration. Or another way to think of it is that it CAUSES acceleration. A rocket engine can also cause acceleration. A rocket hovering just above the ground of Earth is accelerating at 1G but not moving because the Earth is causing an opposite 1G acceleration to the rocket and they cancel each other out. The same rocket accelerating at the same 1G on the Moon would take off at 5/6 of 32 feet per second squared acceleration because the Moon's 1/6 gravity only fights the rocket 1/6 as much as Earth's gravity does.
2007-11-02 15:36:10 · answer #2 · answered by campbelp2002 7 · 1⤊ 0⤋
The gravity that keeps us in place on the surface of the Earth is due to the mass of the Earth. We are being accelerated towards the center of the Earth. The closer you get to the center, the less acceleration you would feel. At the very center, you could almost float.
The Earth is inside a galaxy - we're not moving away from it. Our galaxy is moving away from others, but generally not because of gravity - because of dark energy.
2007-11-02 13:53:56 · answer #3 · answered by eri 7 · 1⤊ 0⤋
A rocket accelerating SIMULATES gravity.
Real gravity like the Earths or the Moons or or the Sun is measured by its mass.the greater the mass,the more gravity.
So the moon is 1/6th the size of the Earth so it has 1/6th the gravity.
Gravity,one of the four forces in the universe,we believe is made up of particles called gravitons.
Yes Galaxies do have gravity and there seems to be interaction amounst all the objects in the universe.
2007-11-02 13:46:59 · answer #4 · answered by Mark K 6 · 0⤊ 0⤋
Yes, there is more space between galaxies (actually it is between the super clusters of galaxies, but that's a nit in this context.) But that's not what gravity is -- gravity and acceleration are separate things. Einstein's equivalent principle works only in the "closed room". When you can see the universe, you can see that there is equal mass in all directions. You can't accelerate away from that!
2007-11-02 15:21:13 · answer #5 · answered by morningfoxnorth 6 · 1⤊ 0⤋
2-4 years ago I stocked up on everything I need so was not affected by the shortage. I got good prices because I did it between the panic of 2008 and the current one, which seems to be fading out. Since I am proficient, I don't need to go to the range for long periods of time. Therefore I keep my ammo for actual (potential) use and don't blow it off at the range. I have what should be a lifetime supply, mostly. And let's be real here, on a philosophical level: barring civil war or zombies, how many men are you going to try to kill in this lifetime? Seems like a 6-shooter should be a lifetime supply under normal circumstances. I am prepared for abnormal circumstances. Haven't bought ammo during this crisis, already have plenty. I am, however lusting after getting a flintlock. But that's just for fun. Maybe someday I can afford a nice one.
2016-05-27 02:50:55 · answer #6 · answered by ? 3 · 0⤊ 0⤋
I like your question. I've wondered about this many times myself. And I think it may actually have to do with the differential expansion of the Universe, due to massive objects. The acceleration would be in some four-dimensional context. I know this is wild speculation, but I can't help but think that gravitational acceleration and inertial acceleration are not just similar phenomena. They are ONE phenomenon. I think mass, gravity, time, the speed of light, quantum physics, and the expansion of the Universe are all tied together in some common way that describes the ultimate nature of the Universe.
It is one of my great hopes before I die: that someone will be able to unify them all.
2007-11-02 13:54:54 · answer #7 · answered by Brant 7 · 1⤊ 0⤋
Gravity is actually pulling - it's not an acceleration away from anything.
2007-11-02 16:27:37 · answer #8 · answered by Michael da Man 6 · 0⤊ 1⤋