Forums > General Discussion   Shooting the breeze...

Moonwalks; a question about physics...

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Created by kiterboy > 9 months ago, 23 Jul 2020
kiterboy
2614 posts
23 Jul 2020 5:51PM
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I love a good conspiracy theory, but I've always taken the moon landings to be true.
Never really looked that much into the moon landing conspiracies seriously, only out of curiosity.

However. Something occurred to me the other day, just out of the blue, mind you, that I hadn't really considered before.
I'm sure there are many sites and people who would claim to have answers, for both sides of the conspiracy, but I thought I would pose the question here to see if anyone has any thoughts.

OK, here goes.

For some reason I had the memory of the moonwalks footage I've seen in the past, pop into my mind. More specifically about how I remember them showing the astronauts roving around the moon's surface doing their thing.
More importantly, I remembered how the footage made it look like they were kinda floating as they walked and hopped/jumped across the surface of the moon.

First off I half dismissed the thought as, of course we all know the moon has a 1/6th of the gravity of Earth, of course they would be floaty as they walked, right?

But then I thought about the gravity on the moon, being 1/6th of the Earth.
Let's say a fully kitted out astronaut weighed 95kg; on the moon, if that astronaut stood on a bathroom scale on the moon, he would only register as 15.83kg (give or take).
Let's be kind and say 15kg.

I don't know how many of you are familiar with 15kg in weight in your hands, but I know if I threw 15 kg, it wouldn't do a floaty arc to the ground, it'd do a pretty swift drop down.
In fact, I don't think I could throw 15kg (given the strength ok, allow me that) to do a floaty arc to the ground, unless I was in a pool.
Now I'm pretty sure there is no atmosphere on the moon to present enough resistance to 15kg the way water would.

So what gives?
Why did the astronauts have that floaty-bounce walk about them?

Was the film slowed down, or captured slowly(?)? The frame rate looks pretty smooth, so you can't really put the floaty moonwalks down to a low frame rate.

Any ideas?

Have a look at the footage here. Have a good scroll through and see what you think.





BTW, I am in no way suicidal or taking risks of any kind...

Mr Milk
NSW, 3116 posts
23 Jul 2020 7:56PM
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You are ignoring that G on the moon is only 1/6 * 9.8m/s/s = 1.6m/s/s. So dropping masses accelerate way slower. Thus the floaty walk.

kiterboy
2614 posts
23 Jul 2020 5:59PM
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Mr Milk said..
You are ignoring that G on the moon is only 1/6 * 9.8m/s/s = 1.6m/s/s. So dropping masses accelerate way slower. Thus the floaty walk.


Ah, damn, I knew I was missing something.
I should have thought of that TBH, but it's been a while since I've done those sort of calcs.

Have a look at the video from 8:30, great example of it.

holy guacamole
1393 posts
23 Jul 2020 6:01PM
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F=ma. Newton.

Combine this with projectile motion calculus and you get a more elongated arc.

The slo-mo effect is just human perception. We've evolved to register movement on earth as natural, therefore when you put a person on the moon and they have no need for quick movements, they put less force into their motion and therefore, they "look" slo-mo.

Just like a hummingbird looks ridiculously fast to a human eye in the opposite sense.

If we put a person onto an asteroid 1/10 the size of the moon, they could Probably jump hundreds of metres.

prejiden
72 posts
23 Jul 2020 6:09PM
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why didnt they go back to the moon?
why was it a one off?

TonyAbbott
924 posts
23 Jul 2020 6:16PM
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Is the moon flat too?

kiterboy
2614 posts
23 Jul 2020 6:25PM
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prejiden said..
why didnt they go back to the moon?
why was it a one off?


Wasn't there 6 crewed missions?

kiterboy
2614 posts
23 Jul 2020 6:26PM
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TonyAbbott said..
Is the moon flat too?


Of course it is, look up now. It looks flat doesn't it?

prejiden
72 posts
23 Jul 2020 6:32PM
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TonyAbbott said..
Is the moon flat too?


you been? pix?

holy guacamole
1393 posts
23 Jul 2020 7:04PM
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100 megapixel image. Err, doesn't look flat to me.




Craig66
NSW, 2466 posts
23 Jul 2020 9:12PM
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Iv heard covid actually came from moon dust.

CH3MTR4IL5
WA, 939 posts
23 Jul 2020 8:00PM
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Craig66 said..
Iv heard covid actually came from moon dust.


You're thinking of chemtrails

Macroscien
QLD, 6808 posts
23 Jul 2020 10:24PM
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We live in very interesting time again.
Within next few years few nations plan again to send people to walk on the Moon.
After 50 years we are going back to Moon , Hurraaa!! Bravo !
Not so fast.
In the case of conflict between USA and China all existing satellites will be blown to pieces instantly.
Which means billions of small space junk clogging the orbit for long time.
It could take another 50 year to clear orbit from this space junk.
Than also we are going to stone age here on Earth too.
Without any satellite communication, meteorological even GPS.

Lets think again is it worth it ( to call the war between those two nations)
Scenario above don't need even nuclear armageddon. Satellites will be annihilated prior to conflict as a precaution.
warning !

Craig66
NSW, 2466 posts
23 Jul 2020 10:47PM
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Select to expand quote
Macroscien said..
We live in very interesting time again.
Within next few years few nations plan again to send people to walk on the Moon.
After 50 years we are going back to Moon , Hurraaa!! Bravo !
Not so fast.
In the case of conflict between USA and China all existing satellites will be blown to pieces instantly.
Which means billions of small space junk clogging the orbit for long time.
It could take another 50 year to clear orbit from this space junk.
Than also we are going to stone age here on Earth too.
Without any satellite communication, meteorological even GPS.

Lets think again is it worth it ( to call the war between those two nations)
Scenario above don't need even nuclear armageddon. Satellites will be annihilated prior to conflict as a precaution.
warning !


Look at the moon dust

Ben1973
1008 posts
23 Jul 2020 8:51PM
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prejiden said..
why didnt they go back to the moon?
why was it a one off?


I heard the hotels there were crap so no one wanted to

Mr Milk
NSW, 3116 posts
23 Jul 2020 11:54PM
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You got me thinking about low G missions in space. The Japanese Hayabusa probes to the asteroids managed to land and stay down in ultra low gravity. The moon is about 1/6 of Earth's gravity. Ryugu is about 1/80 000. G is about 0.2mm/s/s.
Not only did they get there, but they managed to sample the asteroids. The second mission is due back in December.

www.sciencealert.com/japan-s-space-probe-is-returning-to-earth-with-an-actual-piece-of-asteroid

*For PM33 and his new buddy. The Japanese Hayabusa mission flew way up near the dome and landed on a speck of dust. It scraped a speck off that speck and will be released to fall down near the end of this year.

saltiest1
NSW, 2562 posts
24 Jul 2020 6:58AM
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Spacesuit weighed 127kg.

holy guacamole
1393 posts
24 Jul 2020 5:49AM
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Mr Milk said..
You got me thinking about low G missions in space. The Japanese Hayabusa probes to the asteroids managed to land and stay down in ultra low gravity. The moon is about 1/6 of Earth's gravity. Ryugu is about 1/80 000. G is about 0.2mm/s/s.
Not only did they get there, but they managed to sample the asteroids. The second mission is due back in December.

www.sciencealert.com/japan-s-space-probe-is-returning-to-earth-with-an-actual-piece-of-asteroid

*For PM33 and his new buddy. The Japanese Hayabusa mission flew way up near the dome and landed on a speck of dust. It scraped a speck off that speck and will be released to fall down near the end of this year.

Sweet Milkman. That's cool.

The flat earth crap is such an insult to the intelligence of humanity and the majesty of the universe.

It can only be explained as a genetic predisposition to dumbfarktardery.

I guess that's all part of the code. Mutations are not only necessary, but also serve as a comparison in evolution between optimisation and the error inherent in random dumbfarktardery.

I imagine human evolution with eventually weed out the flat thinkers with natural selection. Who'd want to breed with them?

Mr Milk
NSW, 3116 posts
24 Jul 2020 9:39AM
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Another interesting fact is that the asteroid is spinning, so centripetal force comes into calculations. At its equator, the effective gravity is reduced by about 20%

astrobob.areavoices.com/2018/09/23/things-are-hopping-on-asteroid-ryugu-see-the-first-photo-and-go-for-a-stroll/

prejiden
72 posts
24 Jul 2020 7:42AM
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Select to expand quote
Macroscien said..
We live in very interesting time again.
Within next few years few nations plan again to send people to walk on the Moon.
After 50 years we are going back to Moon , Hurraaa!! Bravo !
Not so fast.
In the case of conflict between USA and China all existing satellites will be blown to pieces instantly.
Which means billions of small space junk clogging the orbit for long time.
It could take another 50 year to clear orbit from this space junk.
Than also we are going to stone age here on Earth too.
Without any satellite communication, meteorological even GPS.

Lets think again is it worth it ( to call the war between those two nations)
Scenario above don't need even nuclear armageddon. Satellites will be annihilated prior to conflict as a precaution.
warning !


That's why pandemics perfect. Just kills people leaving the wealth intact.

FormulaNova
WA, 15090 posts
24 Jul 2020 10:28AM
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holy guacamole said..
The flat earth crap is such an insult to the intelligence of humanity and the majesty of the universe.

It can only be explained as a genetic predisposition to dumbfarktardery.

I guess that's all part of the code. Mutations are not only necessary, but also serve as a comparison in evolution between optimisation and the error inherent in random dumbfarktardery.

I imagine human evolution with eventually weed out the flat thinkers with natural selection. Who'd want to breed with them?


You are ignoring the fact that the same genes present in women could present an interesting attraction. A woman that is not a deep thinker and believes everything you say to her, and if its really complex just show her a meme or a cartoon on instagram... I think you haven't thought that through.. those genes will go gang-busters. Kids everywhere. So what if the male version does not reproduce, the female will at a 4:1 at least.



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Forums > General Discussion   Shooting the breeze...


"Moonwalks; a question about physics..." started by kiterboy