When people jump out of a plane and start falling, they experience the force of gravity with no balancing force, and they accelerate. Therefore the on who jumped first will always be falling faster than the one who jumped second. When the second one takes the arm of the first one, the first one experiences a force pulling upward, and therefore will accelerate at less than gravitational acceleration. Because the force on the arm is a tensile force, it pulls in an equal and opposite direction on the second jumper. The second jumper therefore experiences a force pulling downward, and accelerates at a little more than by gravity alone. This tensile force will act until the speed of both are the same, from which time they will both accelerate at the same rate.So the first jumper will slow down and the second one will speed up.Of course the gravity is not the only force they’ll experience. They will also experience the aerodynamic force of air resistance. Unlike gravity, which is constant, the force of air resistance increases with the speed of the body. The body will therefore only accelerate until the force of gravity is balanced by the force of air resistance, and then it will fall at a constant rate. At this point skydivers can hold on to each other without any force between them.
Yes! It is possible to jump out of an airplane without a parachute and survive. Although, your chances of doing so are slim to none.Kill yourself! Is what you’ll end up doing. Nobody, I mean nobody lives to tell the tale of an extraordinary jump, I mean you can try, but the likilihood of living is slim to none so it’s best to drink that last drink, smoke that last smoke, cuz you’re ain’t com’in back to tell the tale. Arch, reach, pull motherfucker or else!It’s possible for me to jump and perform a water landing and survive, all day long. However, for you, the days are looking slim, you will die. You will drown, without a doubt you will succumb to the waters fury, you will die. Water landings are for tough motherfuckers who handed their shit as it happens.Unless your wearing a wingsuit and know how to operate this extra piece of equipment, unless you are wearing a sport parachute harness and have some training you will die performing a water landing, Navy Seal, Army Ranger, and Marsoc aside you’ll not make it.Skydiving is death, and skydiving is life. Come with and ride, you have no idea. Until then….
AIRPLANE FLIGHT...I'm Scared!!! Any help for 1st time flyer?
Firstly, its safer than driving, or crossing the road in major cities, secondly, I have always found it to be a real sense of freedom, when you're up there, its beautiful, another world, if you are scared of heights, just dont look down, if its clear, even high up, you can see amazing detail below, but mostly, you'll just see clouds. Just look out and not down, you'll be fine. All the windows have plastic shutters on them, so if you are really freaked, pull it down and you won't see a thing. I have an illness that makes me feel like I'm falling when I'm high up, even a few steps on a ladder, and I have no problem flying. Its a little cramped, unless you're in business class, so make sure you regularly stretch your legs. Sometimes you do get air turbulence and it can feel a bit scarey, but bear in mind those pilots are highly trained, and the modern aircraft will compensate itself for any buffeting. Air turbulence is caused by the difference between warm and cold air in the sky, so it cant be seen or avoided. Sometimes it happens, sometimes not. You could tell the cabin crew that you are a first time flyer and are nervous and they'll look out for you. If you drink alcohol, every drink in the air will feel like two on the ground, so pace yourself, it also dehydrates you and can have the opposite effect of calming you down. If you still can't find peace of mind, see your doctor, tell him your fears, and ask him to prescribe a very mild tranquiliser, one for the outward journey, one for the return. But try and face your fear, maybe its the fear of the unknown, rather than fear of actual flying. Also, dont freak before take of if you see what looks like smoke coming from all the air vents, it is likely they will "spray" the cabin returning from Costa Rica with a pescticide to avoid bringing nasty bugs home. It is harmless to humans, but I freaked when I first saw it! I hope you enjoy flying, I find it really exciting. My daughter was afraid the first few times, so on take off and landing, we tried to count down to when the lift off and touch down might happen, this took her mind off it. Also, as you climb after take off and descend for landing, your ears will probably pop due to pressure changes, either take some sweets to suck or swallow until they clear, give small children a soother to suck or a bottle if they are feeding and they'll be fine.
Couldnt People Run Out of the Twin Towers during 9/11?
Well, falling any higher then 3 stories can kill you, even if you have a crash mat at the bottom, someone like 30+ stories high jumping down would not end well, plus momentum and gravity would probably push them off a few buildings from the crash mat anyway. Also, everything was out of order, elevators and everything. So the stairs where PACKED, people trying to get out. Everyone was also panicking and worried, as well as you had rescue squads running up the stairs to the higher floors to try and save people, while you had people running down the stairs trying to leave You couldnt send a helicopter up, because it was alot of smoke, it would be too hard to see, and would actually just create more delay time then help anyone in the end The best they could really do is provide medical services for the people who did make it out, and try to bring the people still stuck in the upper floors to the lower floors fast Also, fire spreads quickly and causes damage quickly, alot of the stair exits where probably blocked off by fallen debris, or flames
Explain why we say astronauts are weightless when they orbit the earth in a satellite such as a space shuttle.?
The orbital velocity (17,500mph) gives the space shuttle a centriphical force that's keeps it in orbit and it's about the same as the gravitational force that's constantly tugging the shuttle downward. If you can get these two forces to match each other, then your in orbit! However, if the shuttle's velocity provides it with a centriphical force that is greater than the gravitational pull then you escape the Earths gravitational force (The shuttle could never have done this, but this is for the sake of an example). This is called escape velocity and this is what deep space probes and the Apollo astronauts used to leave Earth orbit and travel deep into space. However, is you slow the shuttle down enough then the centriphical force will become less than the Earth's pull, causing it to fall. This is how the Space Shuttle astronauts de-orbited. So the fact that you'd fall back to Earth because of a lower velocity means that there is still gravity tugging at you, it's just being equally countered. Imagine you a had a weight attached to a string and you spun it around just fast enough to keep it spinning; thats "orbital velocity". However, if you slow down enough it'll fall down; this is "de-orbit" if you will.
This scenario happened to an instructor while I was in Air Force pilot training.It was not what he intended to do, but it ended up being what you’re suggesting.He and a student got into a spin from which they could not recover. The student, a member of my class, had made comments to friends that if he were ever in a position to eject, he wouldn’t do it. No one reported him for saying that because we didn’t take him seriously.AND THEN IT HAPPENEDUnfortunately, a few weeks later he was in that situation and, as he said, he did not eject. No one will ever know exactly what happened in the last few seconds—so this is speculation from the accident report—but it appeared that the instructor delayed his own ejection trying to talk the reluctant student into pulling the handles.Just about one second too late the instructor pulled his handles anyway. He came out and the chute streamed out behind him, then he hit. One more second and the chute would have had time to inflate.CLOSED CASKET FUNERAL EITHER WAYI supposed you know pretty much nothing about physics, so let me say that the only difference your suggestion would make is that the body would be in slightly better shape. The student was killed in the crash and they recovered nothing more than pieces. The instructor was still intact, but, well, dead is dead. They both had closed casket funerals.WE CAN TAKE A LEAD FROM THE AIR FORCE PROCEDURESAfter this accident inquiry was complete, the Air Force modified its ejection procedures to make it crystal clear that the pilot in command was to say Bail Out! Bail Out! Bail Out! and then do it instantly. No one was to ever delay ejection to attempt to get a reluctant crew member to go.So, if you think about it, in a backwards way, the Air Force officially said that your idea won’t work. Of course those of us who attended the closed casket funerals already knew that.
Yes, and this is practised regularly as tandem skydiving. I did my own previous-to-second jump as tandem - my jumpmaster later became my instructor.The only thing which really means is wing load, which is defined as the mass of the skydiver divided by the area of the parchute. Therefore the tandem parachutes are larger than the usual single-person parachutes.But to answer the question: is it possible for two persons to jump on a parachute intended to be used by one single person? The answer is, surprisingly, yes - providing the passenger is not morbidly obese.What happens is that the wing loading is now doubled. Your descent speed and glide speed will increase. Now the rest depends on what kind of canopy you have. If you have a gentle and forgiving canopy, such as a student canopy, prepare for a rough parachute landing roll and bruises. If you have a performance canopy, prepare for a very rough landing with possibility of sprained joints or even broken bones.But you will survive alive.What you need to do is that you attach your legs on the same leg straps (or, if not possible, belt them together) and hitch your upper torsos together with a belt, rope or cargo strap. You may have your bodies either facing each other (vis-a-vis) or facing the same direction (tandem) but make sure you have strapped nothing around the parachute container itself so that it will open. Most modern jump parachutes have bottom of container pilot chutes, so deployment itself won’t be a problem if the container is unobstructed.
Falling Bodies question?
the key phrase is assume they are in free fall; at the top of their motion, they are stationary, so we can think of them as falling to the trampoline from their maximum height use the equation: dist = 1/2 gt^2 or t=sqrt[2d/g] where g is the accel due to grav and t is the time if one is twice as high as the other, meaning d is twice as great, she spends Sqrt[2] longer in the air, so the ratio of times is sqrt[2] or 1.414
Ohh another fun theoretical question! If everyone on the plane jumped at the same time the plane would dip slightly and then return to normal flight. When everyone is mid-jump their weight will be momentarily removed from the plane. So the plane would actually be carrying less weight for that fraction of a second and its lift would continue to be the same. So the plane would actually rise (a very small amount for a fraction of a second).Unfortunately, in physics there's no such thing as a free lunch. When everyone starts to jump they will push down on the plane to jump into the air. That extra downward force would push the aircraft down ever so slightly.So when you jump you push the plane down a little and then while you're mid-jump the plane raises a little to meet you...That said you'd probably feel the aircraft move more when flying through turbulence. You're talking about a relatively small force applied for a tiny fraction of a second. An aircraft (the equipment, the passangers luggage, the cargo freight, etc) has a lot of mass and inertia compared to the people riding it. You'll move it a little, but not enough to do anything interesting...