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OK, lets start with the fact that the OP asked for a maximum G force that can be survived and pointed out that there are recorded cases of people surviving 75G.That being so, any claim for less than 75G is plainly not a maximum and so it's not what the OP asked for.

I know that duration has a lot to do with G tolerance. Can a person learn to work under higher G loads full time? I've personally experience 3 G's and found it possible, but very difficult to lift my arms (very strange feeling).

your G-tolerance highly depends on your own weight, 2G is twice your own weight, 3G is 3 times your weight.if you weigh 100 pounds you'll weigh at 2G 200 pounds, 3G 300 pounds.so there are 4 issues:maximum weight you can handle, even WITH adapting. cause each G above 1G is another you on your back and getting more powerfull adds muscle adds again WEIGHT.joint damage, 200 pounds can already stress your joints heavely.law of Newton, the gravitational acceleration, if you drop your leg at 3G without force holding it up you'll get a speed of about 100 feet/sec it falls, with it's tripled weight. on earth it's 32 feet/sec it falls and you'll have a normal weighted leg.so your leg can be easely oblitherated at even 3G when trying to walk like on earth. each feet you let go of something is equal to 3 feet on earth falling.calories. these will eventually burn faster than you can consume since the labour will reach a point where it exceeds your energy consuming since we can't process fast enough at some point, and if you can, you'll just gain weight from the eating that burns even more calories.anyone objects on my statements?I think the maximum is around 1,2 to 1,5G to be able to live in for humans for longer periods of time.

yeah that's right, but what about my calculation above of your rock at 3G?did I do it right or did I made some error in it?QuoteOK, lets start with the fact that the OP asked for a maximum G force that can be survived and pointed out that there are recorded cases of people surviving 75G.That being so, any claim for less than 75G is plainly not a maximum and so it's not what the OP asked for.last sentence of him, he said:QuoteI know that duration has a lot to do with G tolerance. Can a person learn to work under higher G loads full time? I've personally experience 3 G's and found it possible, but very difficult to lift my arms (very strange feeling).

Quote from: gbc89 on 28/04/2010 11:15:42yeah that's right, but what about my calculation above of your rock at 3G?did I do it right or did I made some error in it?QuoteOK, lets start with the fact that the OP asked for a maximum G force that can be survived and pointed out that there are recorded cases of people surviving 75G.That being so, any claim for less than 75G is plainly not a maximum and so it's not what the OP asked for.last sentence of him, he said:QuoteI know that duration has a lot to do with G tolerance. Can a person learn to work under higher G loads full time? I've personally experience 3 G's and found it possible, but very difficult to lift my arms (very strange feeling).OK, so he says he experienced a sustained 3G (rather than a shock loading like a plane crash) for long enough to say it felt odd and, in response to this you say that the biggest sustained acceleration you could survive is 1.5GThere's certainly an error or more in your calculation. It's hard to say where because it's not clear what you are doing.If you were right about a couple more g of acceleration giving rise to 4200 g more deceleration then you would break the conservation of energy.I think you need to look here....sorry, you cannot view external links. To see them, please REGISTER or LOGINFind the equations you need, calculate the accelerations etc properly (preferably in SI units) and then see what you get.