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'G' force

A

anandsatya

Junior Member
if you tavel in afast plane.you can easily experience some amount of 'G' force on your body.But why aren't feeling it when EARTH is revolving around sun at very high speed.:frown:
 
Originally posted by: anandsatya
if you tavel in afast plane.you can easily experience some amount of 'G' force on your body.But why aren't feeling it when EARTH is revolving around sun at very high speed.:frown:
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Does this piss you off?
 
Originally posted by: notfred
G forces are caused by acceleration, not velocity. The earth does not accelerate very quickly.
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Bingo. When the plane is going at a constant speed, you won't be feeling any G-Forces either.
The entire solar system is travelling at a few hundred thousand miles per hour around the galaxy, and the galaxy is travelling even faster than that through the universe. But you don't feel it either, because there is no acceleration.
 
Originally posted by: virtualgames0
Originally posted by: notfred
G forces are caused by acceleration, not velocity. The earth does not accelerate very quickly.
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Bingo. When the plane is going at a constant speed, you won't be feeling any G-Forces either.
The entire solar system is travelling at a few hundred thousand miles per hour around the galaxy, and the galaxy is travelling even faster than that through the universe. But you don't feel it either, because there is no acceleration.
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Not true. If the earth was traveling in a straight line, then you would be correct. But remember, velocity is a vector, and since the earth is rotating around the sun, there is an angular motion, even with constant velocity. The same reason a bucket of water won't pour out if you swing it around with a rope tied to it.

So there IS an acceleration, but it is so small, compared to the force of gravity, that you don't perceive it. Also, since the earth is spinning on its own axis, it will tend to want to fling you off the earth (from the same reasoning). And so even though the earth is rotating at a constant rate, there is an acceleration associated with it, as well as with going around the sun! All swamped out by gravity!
 
Hold on, hold on. Am I not correct in saying that we are all currently experiencing 1 G. I mean a G is a unit of gravitational force. And, of course we are all currently experiencing gravity. So, how is everyone saying that we arent experiencing and G force? And, you are feeling it. Dont you feel your weight? Your weight is caused by G force. If you were experiencing 2 G's then you would feel two times as heavy. So to answer the OP's question, you kind of are feeling it.
 
Originally posted by: saahmed
Hold on, hold on. Am I not correct in saying that we are all currently experiencing 1 G. I mean a G is a unit of gravitational force. And, of course we are all currently experiencing gravity. So, how is everyone saying that we arent experiencing and G force? And, you are feeling it. Dont you feel your weight? Your weight is caused by G force. If you were experiencing 2 G's then you would feel two times as heavy. So to answer the OP's question, you kind of are feeling it.
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You feel weight because of your interaction with the Earth. Since the Earth has such a huge mass, you feel the gravitational force fairly strongly.

The actual force is:

(Gravitational Constant)*(Your mass)*(Earth's mass)/((Radius of Earth)^2)
 
Originally posted by: Lonyo
Originally posted by: notfred
G forces are caused by acceleration, not velocity. The earth does not accelerate very quickly.
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Does it accelerate at all, isn't it constant?
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It's constantly accelerating in that its direction of motion is constantly changing. I believe its speed also changes. Our orbit is not circular, it is eliptical. When we are closest to the sun, our speed would be faster than when we are farther from the sun.

Disclaimer: I'm not a physicist nor an astronomer, nor do I play either on TV.
 
Originally posted by: notfred
G forces are caused by acceleration, not velocity. The earth does not accelerate very quickly.
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do you mean that if you travel at a constant speed of 1000000km/s. you wont feel any 'G' force .:evil:

 
Originally posted by: anandsatya
Originally posted by: notfred
G forces are caused by acceleration, not velocity. The earth does not accelerate very quickly.
Click to expand...

do you mean that if you travel at a constant speed of 1000000km/s. you wont feel any 'G' force .:evil:
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that exceeds the speed of light so it's impossible by current theories. but yeah no matter how fast you go, you won't experience G force from the speed if you are at a constant velocity (you can remain at the same speed but still experience g force from if the direction changes, like centripetal acceleration)
 
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