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originally posted by: ObsidianEclipse
(New member here - but I've been watching for a while)
In regards to physics and mass. A 20kg (44lbs) rock on earth would weigh 3.3kg (7lbs) on the moon and would be incredibly easy to pick up. However, regardless of what it weighs if you were to give it a kick as hard as you could you'd probably smash your foot to smithereens because it would still have a mass of 20kg, if you look at newtons laws of motion (newtons 3rd law) you will see the 20kg mass would impart an equal and opposite force to the kickers foot.
Now considering the mass of the astronaut is constant regardless of the weight he experiences it may be 'easy' to push away from the lunar surface but the thump upon returning is still proportional to the astronauts mass. Think of an astronaut in a zero g environment for a moment holding a 500kg mass, pushing off from one wall and colliding with another.. As that astronaut I would much prefer to be the other side of that mass rather than between it and the wall. It may seem easy to get that mass moving but the energy is gradual in acceleration but he would likely be crushed to death trying to stop it.
So, on the moon, falling with the mass of the suit and body weight is dangerous still even if the moon was 1/100g or 1/6 g. Mass is constant and the forces required to halt (or move) is still the same (in a simplified manner). Pushing, lifting and jumping are slow increases in momentum whereas hitting the lunar surface is rather sudden.
originally posted by: ngchunter
originally posted by: Semicollegiate
originally posted by: ngchunter
originally posted by: Semicollegiate
Mass = Weight X Constant. They are directly proportional and are effectively the same.
Wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Mass and weight are two different things. The mass does not decrease simply because it's on the moon. You just failed physics again. An astronaut who weight 60 pounds on the moon has about 163 kg of mass.
en.wikipedia.org...
And by the way, yes they did show a slowed descent rate. You're just lying now.
I never said mass decreases, I said weight,
You said they were "effectively the same." Wrong. Dead wrong. You failed physics. Mass matters, inertia matters. They weigh 0 pounds relative to their spacecraft while in orbit, but it still requires energy for them to push themselves around because they have MASS. It's easier because they don't have to fight against gravity, yes, but it still takes a fair bit of strength to get objects with a lot of mass moving, and the same energy to get them to stop. Same goes for an astronaut who's loaded down with a massive life support backpack which will throw off his center of gravity. And we're back to the same discussion we were at before. See above for the calculations on why they CANNOT do the ridiculous things you suggested without likely killing themselves.
originally posted by: wildespace
a reply to: Ove38
I challenge you to jump as high (and fall back as slowly), while wearing the EVA suit, as it happens in this video: www.youtube.com...
originally posted by: Maverick7
a reply to: eightfold
It's not the landing, it's the docking of the ALM with the orbiting CSM.
The chances of failure were very, very large. The ALM had to go from zero to 14,000 mph in the space of one orbit of the Moon and reach an altitude of 62 miles.
originally posted by: Semicollegiate
Falling bodies are smashed by the force of gravity, not the amount of mass. Gravity affects all mass the same.
Mass is part of the equation, but mass doesn't move anything, Force does. The predominant force on the moon is 6 times weaker and nothing in the film showed that.
originally posted by: Semicollegiate
originally posted by: ngchunter
originally posted by: Semicollegiate
originally posted by: ngchunter
originally posted by: Semicollegiate
Mass = Weight X Constant. They are directly proportional and are effectively the same.
Wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Mass and weight are two different things. The mass does not decrease simply because it's on the moon. You just failed physics again. An astronaut who weight 60 pounds on the moon has about 163 kg of mass.
en.wikipedia.org...
And by the way, yes they did show a slowed descent rate. You're just lying now.
I never said mass decreases, I said weight,
You said they were "effectively the same." Wrong. Dead wrong. You failed physics. Mass matters, inertia matters. They weigh 0 pounds relative to their spacecraft while in orbit, but it still requires energy for them to push themselves around because they have MASS. It's easier because they don't have to fight against gravity, yes, but it still takes a fair bit of strength to get objects with a lot of mass moving, and the same energy to get them to stop. Same goes for an astronaut who's loaded down with a massive life support backpack which will throw off his center of gravity. And we're back to the same discussion we were at before. See above for the calculations on why they CANNOT do the ridiculous things you suggested without likely killing themselves.
Falling bodies are smashed by the force of gravity, not the amount of mass. Gravity affects all mass the same.
originally posted by: Maverick7
a reply to: eightfold
It's not the landing, it's the docking of the ALM with the orbiting CSM.
The chances of failure were very, very large. The ALM had to go from zero to 14,000 mph in the space of one orbit of the Moon and reach an altitude of 62 miles.
originally posted by: Saint Exupery
Ascent & rendezvous in lunar orbit was easier than doing it in Earth orbit, both from a dynamics standpoint and because, by the time Apollo flew, both the astronauts and ground controllers had a lot of experience performing this task.
originally posted by: Semicollegiate
originally posted by: wildespace
a reply to: Ove38
I challenge you to jump as high (and fall back as slowly), while wearing the EVA suit, as it happens in this video: www.youtube.com...
The dust kicked up in front of his feet is moving too low, and maybe too slowly, as less gravity means less friction between particles on the surface.
and why is he out of breath from his exertion?
originally posted by: SyxPak
a reply to: eightfold
Good Thread for some, however, It does NOT Debunk any hoax. @8:52 Minutes in the guy even says "It's tough to prove a negative.Can I prove that they didn't shoot this thing on some holly wood sound stage? Nope.I can't prove that...."
By the title I was hoping to come here and find out that my assumption of a lot of anomalies are proven to be some kind of a misunderstanding of what I have seen and thought odd. I leave disappointed...... Syx.
originally posted by: Semicollegiate
The dust kicked up in front of his feet is moving too low,
originally posted by: Semicollegiate
...and maybe too slowly, as less gravity means less friction between particles on the surface.
originally posted by: Semicollegiate
...and why is he out of breath from his exertion?
originally posted by: ngchunter
originally posted by: Semicollegiate
Once?
Something fell on camera once?
Lots more than once, if you would bother to sit down and watch the actual lunar footage from the various missions. There are hours upon hours of footage. And lots of footage of various things being thrown away, falling, dropping, etc. Try actually doing some real research and crunch some real numbers before spouting off. You won't though, like I said, this arguing is pointless.
the lunar surface is very reflective. otherwise the moon would not light up at night correct?
originally posted by: GaryN
a reply to: yuppa
the lunar surface is very reflective. otherwise the moon would not light up at night correct?
No, the Lunar surface is very dull, and if they ever would, then taking a picture of the Moon from the ISS, when looking AWAY from Earth, would prove it.
Nobody stops to think about why there has never been, and never will be, a HIRISE type camera orbiting the Moon. Well, you don't send a HIRISE-type camera to a planet with no atmosphere, you send spectral imagers that detect IR and UV, along with laser altimetry to create those images they show us.
On this page is an R-G-B filtered view of Earth and the Moon from the EPOXI probe, showing the colour of the Moon when there is no atmosphere. What colour is it?
Not silver/grey for sure, that is only what we see due to Earths atmosphere.
www.nasa.gov...
originally posted by: ngchunter
originally posted by: Semicollegiate
originally posted by: wildespace
a reply to: Ove38
I challenge you to jump as high (and fall back as slowly), while wearing the EVA suit, as it happens in this video: www.youtube.com...
The dust kicked up in front of his feet is moving too low, and maybe too slowly, as less gravity means less friction between particles on the surface.
and why is he out of breath from his exertion?
He's still carrying a lot of mass. Inertia escapes you apparently. And actually the dust proves we went.
www.popsci.com...
Tracking the movement of the dust cloud clearly shows characteristic rooster tails and not the simple parabolic arc of a dust cloud we would see ... on Earth.
Air resistance on Earth drags particles down fairly quickly whereas on the Moon the lack of air
resistance gives particles a longer trajectory.