Red Bull Stratos
 

Still trying to figure out how exactly they got his beach balls to fit into his suit. This man is a badass.

They are conducting a live press conference here in a few, for anyone interested: http://www.redbullstratos.com/live/

Intense

Preliminary data: 373 m/s or 1342 kph or 833.9 mph... in other words, mach 1.24. Has to be peer reviewed, but looks like he broke the sound barrier. :D

Dude stepped off the edge @ 128,100ft.
Motherfucker. :tremble:

Exactly! I have trouble climbing to 10 feet off the ground. :panic: 128k, it's more like :lala: close your eyes and jump.

I watched it with my girlfriend at lunch. She could barely handle it on the cell phone.

I've been pretty interested in this for a while. I'm a chemistry major who wants to work with rocket and jet propulsion. To me this is the beginning of privatized space travel. Kittinger was the first step for NASA in the 60s. Less than a decade later, we were on the moon.

I think regular space flights for private citizens ins't too far off in the future. I think private travel to the moon will happen in our lifetime.

Can you imagine what was going through his mind standing on the platform- knowing you are falling 24 miles AND going to go faster than the speed of sound ?

Balls- he has them.

:rockwoot:

I read an article about him a year ago, where they said he'd be in big trouble unless he kept himself heads-down (kind of like they did on Star Trek) for the first half of it. I was surprised he didn't do that.

Yeah, because if he started to tumble badly he'd have no way to correct it because of the lack of air.

He was tumbling pretty bad after the first minute though.

Have they never seen Youtube and the Kittinger jump? Kittinger jumps forward but rotates on the way down to look at the Balloon.

Yeah he was. I'd have lost breakfast, lunch, and dinner for the last month at that point :lol;

I'd have lost it as soon as I stuck my head out the door. I would have grabbed onto the chair and said, nuh uh.. I don't care how rough a landing it is, I'm going to ride down in this thing. I know rationally it's probably better to jump at that point, but fear of heights is never rational. :lol:

He's lucky he didn't lose his arms and legs. That would of been fucked up to see a man ripped apart live.

Secondary purpose of the suit? Hold the pieces together?

At least, that's what some TX DPS officers seem to think of sportbike riders who actually wear leather...

At what altitude do you start getting above the atmosphere where there will be a heat issue?

Gonna guess somewhere above 128,100ft. :lol:

That'd be the thermosphere which is about 120km above sea level. Not a lot of molecules and if you are in the sun, you are hot as fire, in the shade, colder than ice.

Its not the fact that you are hitting atmosphere, but when something enters earths atmosphere from orbit it is usually travelling at a fairly high rate of speed. Its the high rate of speed vs atmosphere that causes stuff to burn up. In this case he started falling from 0mph and accelerated from there until he hit terminal velocity (maximum speed at which his shape was able to cut through the air), at that point the air would eventually slow him down keeping him at his max velocity.

When something enters from space it is above its max velocity and air slows it down tremendously with heat caused by friction with air molecules being a byproduct.

I asked the same question yesterday and the internet gave me the answer

I see what he was asking. The space shuttle comes out of space at 17,000mph and they start burning up in the mesosphere. (same place meteorites burn up). I believe the burn stops at the stratosphere becuase they have slowed down to mach5 or so.

What I think is cool is that according to the general theory of relativity, a man in space would (where Felix and Kittinger to a degree was) would not feel the rush of free fall until the troposphere with the thicker air.

The interwebz is awezome.

Kittinger has actually talked about this... He said he was scared out of his fucking mind at first because he didn't know if he was falling or not.

I remember watching an interview of him talking about having to rotate to make sure he was falling. That'd be a scaring feeling at first.

I really hate that Kittinger never really got that much recognition. I believe him to be the first man in space. Almost everything about that altitude screams space except there is gravity to pull him down. If he took off his suit at that height his blood would boil instantly. That's space to me.

Why wouldn't you? Anytime something causes you to accelerate, you're going to feel it.

hardly any external pressure and basically no friction.

It's hard to demostrate without pictures but we all know F=ma which means the net force is equal to an objects mass times acceleration (acceleration is change in velocity over change in time). A more accurate way to put it is a=Fnet/m.

First off all of this is relative to Felix and not us. To us he is accelerating at roughly -(9.8m/s)/s. To felix though, it's a different story. Think of watching a man standing on a train going 30mph. To the man on the train, he's standing still. To you looking at him on the train, he's going 30mph.

To put it simply, if you skydive, you feel the free fall feeling because you have air molecules pushing against you and you are pushing against air molecules. The force your exert on the air molecules is greater than what they exert on you so you accelerate and you feel it.

For Felix, he isn't pushing against any air molecules and there aren't any air molecules pushing against him. The net force relative to him is practically 0. a=Fnet/m=0/m=0. Relative to Felix he doesn't notice acceleration.

http://25.media.tumblr.com/tumblr_mb...oo1_r1_400.gif

http://img.photobucket.com/albums/v6...ps2a45e1a4.jpg

You wont know you are falling unless you feel the sensation of air across skin or have a visual reference that you are falling. If you jump out of a window you will know you are falling because you see the ground getting closer, you might get a second or two of rushing air but that really it. Jumping out of a plane is similar, but you dont get as good of a sense of distance until you are pretty close to hitting, but you will feel the wind rushing past your skin.

In this case since he was so high up and encased in a space suit he had neither. He would have eventually noticed that he was getting closer to the earth but it would have taken so long, and been such a gradual process that it would be hard to notice.

A good comparison is the zeroG flights, really while it looks like they are flying, they are actually falling inside of a plane which is loosing altitude at the correct angle and speed so as to mimic zero gravity. The people inside the plane without a visual reference or physical cue only know that they are floating, but have no idea how fast they are actually falling.

http://www.youtube.com/watch?v=S2VLyX80eXs

The only thing air does is slow you down. It isn't responsible for the sinking feeling you get when you jump.

Get in your car and floor the gas. The reason you feel that isn't because of air resistance inside the car. :lol:

You're right. You feel the force of the car pushing you forward, since your body is trying to stay at rest (look up: inertia).

If there is no air, no other object to push against you as you fall... how do you know you are falling? Perhaps when he initially bunny hopped off the ledge there was that "my guts are changing position" sensation.. but once all that settled into a constant delta V (acceleration), you have no way of really FEELING the fall.

All I can tell you is that when I jumped from a plane, I definitely "felt" it in my stomach before any air resistance was felt. I am pretty sure this is due to the fluids and organs inside your body. If you jump from a plane, those things will try to stay where they were, causing them to rise up inside your body. Common sense says you'll feel that.

And yet you can guarantee they "felt" the sudden weight loss when the plane started to dive. That's my point.

redflip

Ive jumped from plenty of planes, and helicopters, and towers, and I have never felt that feeling that you are describing

You weren't in a vacuum. If unsure did your blood suddenly boil and your head explode and die? When you jumped out of the plane there was pressure and pressure affects your fluids differently. PV=nRT is the ideal gas law which you can argue for our basis relates to the entire unit(Everything inside Felix's space suit). n = moles which is mass. If you look at a periodic table, the number you see is grams/mole.

Weight is a Force and is derived from mass times gravity. When you weigh yourself on the scale you're actually taking the mass of yourself times the affect of gravity at that location (you weigh less at the equator because you are farther from the center of the earth).

Now going to the PV=nRT. Set the pressure to 0 and you get 0=nRT. Solve for n you get n=0. In a vacuum the weight of your cells, brain, suit, or the 2 ton steel balls Felix brought weigh to 0. For our purposes you can set Force=Weight. Our weight is 0 and our force is 0. a=(0 force)/m. You don't feel acceleration in a vacuum because relative to the unit of Felix, there is no acceleration.

Granted, no one knew until Kittinger went up in 1960.

So what you guys are saying is, if you were blindfolded, and totally sealed inside a thick wetsuit or something like that so that you couldn't feel any changes in air movements, that you wouldn't be able to detect falling if someone opened a trap door under you?

No way. Your body is mostly fluid, and it can feel the affects of that fluid being displaced.

Only if you are falling in a vacuum. Pressure is the key thing here. If you are in a vacuum that is falling you would.

What does vacuum have to do with inertia's affects on the body? If you're playing football and suffer a concussion, inertia is going to smash your brain up against the inside of your skull regardless of whether you're playing outside or in a vacuum chamber.

Then you'd have two opposing forces and yes, you'd feel a negative acceleration as your brain smashes into your skull. But we are talking about free fall. There are no opposing forces.

Are you just being stubborn and wanting to argue or do you honestly feel that Einstein is wrong and also that Kittinger and Felix are liars? I showed the math in the above posts.

If Felix has said something about it, feel free to post it. I don't read every single news article.

All I know is that everything with mass has intertia. Including the organs inside your body. So if something grabs you and pulls you in one direction, your organs are initially going to try to remain where they are. You're telling me you wouldn't feel that?

Pressure has everything to do with this. Go scuba diving. Feel what it feels like to have water just totally pushing against you. We have that same feeling of pressure on land as well and where you were jumping from... Where he was at, there was almost 0 pressure. He really just didn't feel much until he started spinning.

He probably really felt the initial acceleration off the balloon, but once he lost a reference, it was probably as close to the feeling of weightlessness as you can get.

That's what I'm talking about.

You're right except that in free fall in a vacuum where you have absolutely no forces acting on your at all the molecules in your body are going to fall at the same rate as yoru space suit or as if you were made out of solid steel. Everything falls at the same rate in a vacuum. If for some magical reason your stomach fell at say 9.80 meters per second per second and the rest of your body fell at 9.81 meters per second per second then you'd feel your stomach because your stomach would exert a force against your nerves which are trying to travel at a different velocity.

When you jump out of an airplane you are immediately subject to the affects of air resistance and pressure, like it or not. So in a sense, inside your body your guts want to fall at 9.81m/ss but due to air resistance you are actually falling at 9.70m/ss. Because of that you have a net Force and no matter how small a force, something with mass will experience acceleration.

He's also under as close to constant acceleration as you can get. A lot of the stuff you talk about on earth is changing accelerations which your body can feel.

If you take off in a car and acceleration is kept constant, you are much less impacted by the change in velocity. Add in no real friction and pressure and you got weightlessness.

In space, if you jet yourself one way for just a moment, you will just keep accelerating with nothing to cause friction to slow you down, but you don't feel it at all.

Think about how a boat moves across the water at slow speeds, but you have water and air that will eventually slow it down.

Kittinger talking about being suspended in space
http://www.youtube.com/watch?v=8V2ncwumv9o

Another one.
http://www.youtube.com/watch?v=MQ7N6V-YKJ8

When you say "everything falls at the same rate in a vacuum", yes that's true........ but you're talking about comparing a rock versus a piece of paper. Sure, they would both fall at the same rate in a vacuum. In fact, so would a human body. But, WITHIN that body, the organs are free to move indepedantly.

Think about Battlestar Gallactica. Those Viper ships? The pilots had to wear spacesuits, because there's no life support in those ships. So, they're in a vacuum. Now, what happens when they hit "Launch" and catapult out of the Gallactica? They get pushed back into their seat. Being in a vacuum makes no difference, they still get pushed back into the seat. And yes I realize it's just TV, but there is no reason why that wouldn't happen in real life.

So what I'm saying is, organs would get pushed around inside a body, the same way that a Viper pilot would get pushed back into his seat when he fires his engines.

Did you just use Battlestar Galatica?

Again, if you launch a giant bottle rocket then from the cumbustion of the gasses, gas molecules push against the rocket, that pushes against you, that causes you to get glued back within your seat.

Also, every molecule in your body right now wants to travel to the center of the earth at 9.8m/ss. If you put a rocket on your stomach facing up then those same molecules are going to try and move to the earth at 9.8m/ss.

So where do we disagree? I don't get it.

You're arguing that when jumping to Earth from space that during the free fall you should have the same sensation you would have when skydiving or riding a rollercoaster. That sinking feeling in your stomach, the sensation of falling, whatever you want to call it.

I'm arguing that you don't get that feeling and that you will feel you are suspended in space as Kittinger stated in the video until you enter into the thicker part of the atmosphere. Where you are in contact with a significant number of air molecules

I was just thinking about how he could see the world spinning like a mother fucker through his faceplate - that would make me yack :lol:

What we hear you saying is that if there is a force (like a rocket or a roller coater or a car moving) pushing your body you will feel the effects of that powered movement.

What everyone else here is saying is that in the near vacuum of the upper atmosphere, with no external forces pushing you, and reference both Kittenger and Felix's statements you dont feel or see anything that makes you think you are falling.

The only experience that I can closely relate to the space balloon jumps are my personal experience jumping from a helicopter (2007 and 2008, 12 jumps total), sitting on the edge of the floor and pushing off, I had the sudden sensation (and completely irrational almost shit your pants feeling) that I was being hurtled upwards towards the rotor blades. The only reason i was ever given is that I was expecting air resistance to me falling down, but immediately I felt air from the rotors being pushed down against me giving me the sensation of going against gravity and falling upwards, which lasts for a few quick seconds then the parachute opens and you are mostly ground to a halt suspended from the risers.

Maybe I should have tried it in Homeslice terms.

Instead of using acceleration=Force/mass, we'll say style=budget/fashion. Budget is the net product of work times time. If you aint gots no work then your budget equals 0. With a budget at 0 you won't feel the desired affect of stylin and profilin.

For everything else Khhhhhhaaaaaaaannnnnnn!!!!
http://www.khanacademy.org/science/physics/mechanics

Fighter pilots need G-suits when they make high-G turns, otherwise their blood shifts towards their lower body and they black out. That's proof that the stuff inside your body can move independantly. Your body is strapped into the seat, so it's forced to move with the plane, but the blood wants to stay where it was due to inertia. And that's going to happen regardless of whether there's a vacuum or not. G-force is g-force, it doesn't matter if it's just normal Earth gravity or a 7G turn in a fighter jet. I don't get why you guys are talking about air resistance, when it's gravity and intertia that causes the effects I'm describing.

That's because you don't have constant acceleration. You are forcing the body and everything in it with an extreme change in acceleration and velocity and multiple forces impacting the body in the jet fighter example.

The guy is in a constant acceleration free fall, completely different examples.

:?: Sure, the force is strongest when he initially yanks it into the turn, but his blood distrbution is still going to be affected if he stays in the turn forever, because of centrifical force. Even though he isn't accelerating.

Same thing with one of those carousel things at an amusement park.

But getting back to the point in hand. Take a half-full bottle of water, and glue a big weight on the bottom so that it will fall bottom-first. Take it up in Felix's balloon, and drop it. The water would shift to the top and stay there until terminal velocity is reached. Thus proving that fluids will shift inside a falling body. And I'm saying you'll feel that. Shit I feel it just on a trampoline.

He is changing his acceleration throughtout the turn by changing direction. Seriously, just go take a statics and dynamics class so you can understand how forces work on objects if you are that interested.

Read my edit.

If you produced force on the bottle as you dropped it so that the water inside is forced to the top because the bottle is traveling faster than the force of gravity, this would happen. If you just allowed gravity to take the bottle by just letting go, you wouldn't see the water go to the top until other forces took over forcing the bottle and water around. The water inside the bottle and the bottle itself would only have the force of gravity pulling it down and thus they both would fall at the same rate and the water would maintain it's location in the bottle.

Here is a great example to try out that I learned in high school physics.

Imagine a monkey hanging from a branch. You are hunting that monkey. You know as soon as you shoot, that monkey is going to let go of that branch. So where do you shoot?

You shoot at the monkey. Both the monkey and the bullet will be pulled towards earth at the same rate of acceleration due to gravity.

Our teacher had a little contraption that fired a nerf bullet at a stuffed monkey to prove it.

Ok, so then what am I feeling when I'm on one of those "drop" rides at an amusement park? They take you straight up and just drop you. You can't feel that inside your body?

Correct me if I'm wrong, but you guys seem to be saying that the wind is the only reason I feel that sickening sensation, and I'm saying that's BS.

Trip, I think he does have a point to an extent here. I think initially Felix probably felt that sensation, that shift of the internal organs wanting to stay where they were before he stepped off the platform and began to accelerate. BUT... once that rate of acceleration began, he would cease to feel anything after that initial moment, because then everything is accelerating at the same pace.

:idk: if that is actually what happened, I haven't read statements from Kittinger or Baumgautner on that initial moment where they stepped off the platform. I do know Baumgautner said at the press conferance after this last jump that once he was under way it was hard for him to tell he was falling.

An amusement park ride isn't a true free fall. You have tons of different forces forcing the body in all sorts of directions. Most go faster than gravity and pull you down. This isn't the same.

Please reread all my posts. I have actually already made a statement about initially leaving the balloon.

He would of put more forces on his body by moving laterally and away from the balloon to get off. Those forces are forces that would be greater than just the force of gravity and he would of felt that until he reached just pure free fall.

The water bottle example would just be as close to just a gravity pull as you can get.

Stupid physics :lol:

I'm not talking about roller coasters, I'm talking about those "drop" rides. All they do is haul you up and then release you. And you sure as hell feel that.

Fair enough. I'll admit I skimmed. :lol:

Oh and, I made the statement about the initial drop off the ledge first back on the first page... but hey, I don't read all the way through some posts either, so who am I to talk? :nee:

Kittinger said he didn't know if he was dropping or floating away when he initially left the structure.

I didn't ask you about it, lol

I think what I'm feeling is weightlessness, which according to wikipedia is defined as the total absense of G-forces. Your body is accustomed to feeling the mechanical forces that cause the sensation of weight, so when you jump off something, common sense says that you "feel" the elimination of that force.

A lot of the drop rides do not free fall. They are typically slower or faster than gravity due to friction or being actually pulled down faster.

Interesting piece from wikipedia, explaining that we do "feel" the effects of weightlessness:

Also:

So basically because we hold ourselves up, we feel our weight.

and when we fall with nothing supporting us.

"In the absence of this force, a person would be in free-fall, and would experience weightlessness."

As if we had any question this guy was a bad ass (or a little off his rocker)... here are some of his other jumps:

http://www.youtube.com/watch?v=3_Io1DgObCs&feature=plcp

I actually have video of that. I'll post it later.

What I'm gathering from Homeslice.
"Dear Einstein.

You're a dumbass

Sincerely, Homeslice"

No human has ever experienced 0 gravity. Wikipedia is wrong on that.

We have nothing capable of reaching deep fucking space. Even in deep space, there are probably tiny forces from distant universes. Wonder if there is anywhere with 0 gravity.

Right, because Einstein said anything about the effects of weightlessness on the body.

Exactly, meaning that it's a change you can feel.

http://www.youtube.com/watch?v=cxvsHNRXLjw

And somewhat related, since it's the same concept, but in zero atmosphere:

http://www.youtube.com/watch?v=5C5_dOEyAfk

That's why I said his force from when he stepped off he would feel until he entered true free fall, then he would pretty much feel weightless like he wasn't falling. That's pretty much what we have been saying all along.

Nerds

Jock (strap)

WTF? Einstein's theory or general relativity is based all on gravity and nothing is more important to his study of the affects of gravity than how gravity affects us in a vacuum.

The only possible way your idea of how the molecules within the body vs the entire unit would actually differ in free fall would be due to the molecules closer to the more dense bones slowing down with time as the molecules on your skin being faster in time since they aren't near a larger mass object. The only place with free fall capable of having that affect is if Felix jumped into a black hole. Or if he was near the speed of light.

Monkey getting shot with an arrow. Which if say the arrow came out a velocity only enough to get it 3 ft on the floor but you removed the floor for an indefinite amount, it'd eventualy reach the monkey.
http://www.youtube.com/watch?v=u48dk...ature=youtu.be

We'll never know. We can't even see the end of the universe. What we see of the Universe and what is actually the Universe is equivilent to the significance of 1 atom to our visible universe.

I've wonderered if you were suddenly able to pop into a part of the universe with 0 gravity. No dark matter/energy/gravity/etc. If you could do that would you then collapse into a black hole and possible create a big bang yourself?

Well, that depends on if gravity is a function of smaller forces. I'm pretty rusty on my theoretical physics - and even my mom (PhD in this stuff) hasn't worked in the field in years. Is gravity a force that exists independently of the forces that hold atoms together (electromagnetic, weak/strong forces, etc.), or are they interrelated?



TWF... the only place where a thread can go from talking about a dude skydiving to talking about deep space and gravitational forces. :lol:

Dude, who is arguing that a dart wouldn't fall at the same rate as a monkey? ALL objects will fall at the same rate, unless one of them has a surface area to mass ratio significant enough to increase drag. We already knew this.

Look, I was wrong about the bottled water example..... But the fact remains that you DO feel a fall, because there is a sudden cessation of the mechanical sensation of weight on the body. This causes a different sensation within the ligaments, tissues & organs inside the body. And that "feeling" is gonna happen regardless if you are jumping within a vacuum or a regular atmosphere. You don't need wind or eyesight to know you're failling. That was my whole disagreement with you guys.

Dude, even your quote said a freefall would make you feel weightless. And one of the dudes that actually made the jump that high has actually said he was scared he wasn't falling.

Now back to the topic

http://www.youtube.com/watch?v=oD95-QJMiOs

So what's the issue? Do you disagree with that?

If so, sorry but I don't believe him. Dude was probably just psyched so much about the whole ordeal that he didn't remember the sensations.

At first I was like oh nice unreleased audio...Then I just laughed...I couldnt even imagine what he had going through his head.

I don't think that was an issue. The 100,000ft jump was the 4th of many high altitude jumps. His first one was done at 70,000ft. At that point I doubt another 30,000ft makes much of a difference to him.

Believe what you want to beleive. If you feel that the countless time that physicists have put into the research and testing is wrong for the past 500 fuck it thousands of years, then believe what you want.

I just want to make sure what it is we're disagreeing about. Are you saying that if you took 2 guys, both of them jumping from the same altitude, but one is doing it within the normal atmosphere while the other is doing it inside some kind of vacuum tube, that the first guy would feel the jump while the other wouldn't?

If so, why exactly? My wikipedia quote shows that you don't need rushing air to make your body feel the effects of weightlessness. You were standing on the platform, creating the sensation of weight within your body, but then you jump, resulting in the cessation of that sensation. Not sure what else to say. :shrug:

Would a vacuum make the drop feel less dramatic? Sure, because of the lack of air rushing around you. But that doesn't mean you won't feel ANYTHING.

So you are arguing that people feel weightlessness when falling but they don't feel weightlessness? You have officially confused the fuck out of me. LOL

This is what I am saying...

People feel weightless while falling.

People also feel weightless in space.

When the guy jumped out of the balloon, he would eventually feel weightless after the initial forces of exiting the balloon

Falling weightless feeling guy does not have the sensation of falling, he feels weightless like he does in space due to falling in almost a vacuum, he is in a very low pressure and no air friction. He also is experiencing very little visual cues to verify he is getting closer to earth. All of this makes him feel weightless, but he is having a hard time discerning that he is actually falling at incredible speed.


You can compare this to being in the space shuttle. Gravity is constantly pulling on these astronauts and they are moving at incredible speed around earth and through space in general, but yet they don't feel like they are moving at this incredible speed, they just feel weightless.

I don't disagree with any of that, as long as you agree that he "feels" a change as soon as he steps off the platform. He feels a sudden shift from being fully weighted (at whatever G it was at 120K feet), to being weightless. That is a transition your body feels.

I originally called this feeling "falling" which is where you guys objected, because someone way up there isn't going to feel the wind or sound rushing by him. But while that is true, he is still going to feel the shift from weighted to weightless. I think all of us agree on that, but we are just arguing about which word to call it. Semantics really.

He's really going to have several really weird feeling transitions. He's going to have a quick transitional period between the initial drop part and weightlessness.

Then he is going to go through that weird part of is he falling. Next was probably "OMFG I am spinning". Then he hits the air friction and its like stomping on the brakes really fin hard. Then he probably just has a normal parachute jump type feel.

If you watch the vid of the original dude doing it, he stated that he didnt feel like he was falling until he hit the atmosphere and felt/heard the wind.

Yes, and that is exactly right. I showed you the basic math why that is true. You're choosing to ignore algebra. Maybe some calculus (3 level at that)

Here is how physics works in the very basic form. Imagine these are somewhat to scale and are vector quantities. Vector quantities have magnitude AND DIRECTION. If you are driving a car at 60mph that is the magnitude of your speed. If you are driving your car 60mph to the EAST that is a vector quantity.

Now I'm going to use sideways arrows to demostrate and ask you to try this on your own.

First part:
Push against a wall in your home. Does it actually move (above very small scale)? If so, get a job in the NFL.
Since the wall didn't move here is the force you put against the wall and the force the wall put against you.

----><----
Now add those together by putting the base of the right arrow onto the tip of the red arrow. Add those together and you get a vector quantity of 0. You are back where you started, nothing happend regardless of path. YOU DIDN"T MOVE. That's vector calculus. The force you push against the wall equals the negative force that the wall is pushing against you.

Which by the way when you add those together in regards to velocity you get the change in velocity.
For example
------> +
<-- =
------> minus two dashes so your change in velocity is
---->
Change in velocity is actually acceleration (change of velocity over change in time dv/dt). That is why acceleratin is done with second squared in the denomenator. You're changing speed by say 10m/s for every second of hcange in time. In this case, it's in the positive direction.

Now you are pushing against Saturn V rocket that is parallel to the ground. Left arrow is you, right arrow is giant fucking rocket and the force it exerts
-><-----------------------------------------------------------------
(not to scale)
Do you think that a Saturn V rocket is going to notice you being there? Is your presence pushing against the rocket going to slow it down? Maybe by 1/10000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000 0000000 of a mph, but essentially zero. The rocket ship doesn't notice you there nor do the astronauts (your guts) on the inside or the molecules and energy blasting out the back side. If the rocket suddenly hit another bigger rocket, the astronauts would feel that (for a very short time and probably not long enough to register ot their brain).

Now you are falling from space. Forget the jump part, let's just focus on the 1 minute where he was just falling in space.

Now using the sideways arrows again we'll represent the left arrow as the force of the air pushing against the space jumper.
<---------------------------------------------------------------------------------------------------------------------------------------------------------------------------.

Where is the left arrow? It's not there!

If you add the "two" vectors together you get 0 + -(other vector). That is the reason for constant acceleration.

If want to determine the force of the vector, you multiply the two vectors together. Or more accurately use the dot product. vector(a:left arrow) dotted with vector(b:right arrow)= normal(which is the sqrt of the magnitude of the vectors) of both vectors times cosine of theta. Our theta in this case is 90degrees which equals 0. Vector A is = to zero which makes the dot product equal to 0, 2 times!

Simpler
0*<---------------------(infinity) = 0. Back to A=F/m relative to the jumper. There is no force. So again, F=0/m = 0. No acceleration and that includes every molecule in his body.

That's the math behind it.

:lol:

Poor Homie.