Once the moon has moved to far away from us and the earth's axis is not fixed, will the human race survive.

Question

Assuming that in 3 billion year we will still be around. The moon move 3cm per year farther away from earth.

Answer 1

The rate of 3 cm per year is the present rate. This will reduce progressively as the earth days get longer, and the earth does not transfer its momentum through gravity tidal effect at the current rate. The moon will never obtain enough energy from the earth to be totally free from its gravity, there is simply not enough energy in the spinning earth to do so.
That said, long before the 3 billion years you state is elapsed, the sun would have increased its output to an extent that its heat would made the average temperature on earth higher than the water boiling point, so that would be a good enough reason for humanity to have vacated the premises, assuming we did not destroy ourselves until then.

Answer 2

The Moon is moving away from us because it is taking up Earth's energy from tidal braking that is caused by the Moon. As Earth is slowing down (very slowly), the speed at which the Moon recedes will diminish.

One day, very far into the future, the Earth's spin will be tidally locked with the Moon (always showing the same face to the Moon). When that happens, the Moon will no longer be moving away from Earth. Earth days will last approximately 47 of our present days.

Then, our spin, although it will be very slow, will be locked by the Moon's orbit (our tilt will have changed so that the Moon's orbit will be over our new equator).

The orientation of the spin axis will still be relatively stable because it will be locked with the Moon's orbit which has a lot of angular inertia.

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In about 500,000 years, the Sun's output will have increased by a few percent, enough to make life miserable for us (just a bit too hot to maintain the levels of liquid fresh water). However, 3 billion years form now, when the Moon will have ceased to move away from us, the Sun will not have grown to a red giant (Earth and Moon will still exist -- will we still exist? I do not know).

Answer 3

The Earth will most likely lose its magnetic field long before the Moon stabilizes in an orbit beyond its ability to effect Earths rotation. And if the Human race does not destroy itself before then. The sun's solar winds will start to blow away our atmosphere. If where not living on another planet by then, we will be toast.

Answer 4

The effects will be long term and slow. The earth's axis will start to drift and we may actually wind up with the axis pointing toward the sun for a while. We would need to have extreme climate control to survive

Answer 5

I just answered another such question so I guess I will repeat myself.
No the human race cannot survive since there would be very violent climatic changes and temperature changes. Volcanoes would erupt, super volcanoes would erupt and it only takes one to block out sunlight and usher in an ice age. This would be a minimal effect (the super volcanoes). Many more changes would kill all life on earth, not only humans.

Answer 6

Ya but it will suck, the Earth will start spinning extremely fast and all over the places, one day in one location will be a sunny 80degrees and a couple hours later that location could be experiencing snow. Won't matter anyway I plan on moving to Mars anyway in 3 billion years. lol

Answer 7

the only way for humans to survive would be to inhabit another planet. if the moon moves away, the world is doomed. tides and all will be out of wack, and then the earth will probably become all water or all land.

Answer 8

By then, we will have interstellar travel just like transcontinental travel now. The earth will start to wobble on it's axis and the seasons will become eratic and severe.