How does zero gravity take place on earth and for how long?

Answer 1

pass

Answer 2

Zero Gravity is simply a state of free-fall. When a space vessel is said to be in orbit around the earth, what is actually happening is a state of continuous free-fall---the ship falls AROUND the Earth because it's velocity relative to the ground is fast enough to keep it from falling down to Earth. Anything within the ship is carried at the same velocity the ship travels, and is basically in that same state of free-fall. The resultant effect is that anything within the ship not tied down appears to float.
That's why when astronauts practice with zero-gravity "on earth", they all get in a plane--fly as high as possible--and then cause the plane to free-fall for a time---the affect is basically the same as being in orbit.

Answer 3

Maybe you got put in a corner because you don't know how to describe the problem so others know what the hell you're asking. First Grade Rocks added: "Earth's orbital radius is 1au and its period is 1 year. Instead of its orbital velocity being tangential to the sun, the velocity is changed to radial." Alright; but you still need to clarify yourself a bit. You say you want to redirect Earth's path so its velocity is outward, away from the Sun? Or do you really mean inward, toward the Sun? The answer will be different depending on the case. And since you weren't able to make yourself clear the first time, I think it's prudent to make sure you don't have a typo in there. By the way, what exactly does it mean to be "tangential to the sun"? See what I mean? Your articulative skills need some fine-tuning. And, incidentally, the example of a projectile fired from Earth isn't quite the same thing. Even with an initial velocity exactly parallel to the Earth-Sun radius as reckoned relative to the Earth-local frame, the projectile would still have orbital angular momentum which must be conserved. It wouldn't just move purely radially away from or toward the Sun. It would enter an elliptical solar orbit.

Answer 4

Gravity is the force which we are used to acting on objects. If an object it is free to fall, it will get faster (accelarate) due to gravity.

When we are in a lift it usually falls due to gravity but if it were to be powered down with a force greater than gravity then the passengers in the lift would "float" off the floor of the lift and seem to be in state of "zero-g"

Similar things happen when planes are made to suddenly power downwards or in certain situations with rollercoasters. It would be really interesting fairground ride to have such a lift powering downwards but stopping it would be difficult and unpleasant for the passengers as theyw ould suudenly crash into the floor.

Answer 5

Zero gravity can take place in several places. The most commonly known would be what is called the "Vomit Comet". It is a plane use by NASA to train astrounats to get them "used" to zero-g. I believe they achieve 10 seconds or so of zero-g. Another, but lesser known example would be when you are on a roller coaster. If you have been on one recently, think back to the experience. Were there instances where you swear you have left your seat for a short period of time? Well, there you have it, zero-g.

Answer 6

Maybe possible on some rollercoaster rides, but I can't think of a specific one. You may be thinking of when people go up in a plane that flies in a parabolic altitude pattern. For a few moments, those people can experience zero gravity. Zero gravity is a myth actually, gravity is always present, it may be greatly diminished but it is never zero.

Answer 7

You go up in a plane to the highest level possible,
and the pilot noses the plane up and suddenly down.
As gravity is relatively lower at that height you will sense
"zero" gravity for about one minute until the plane
levels off and you regain weight. "Zero" gravity is felt
since the plane is loosing height at the same speed
as you are for a short time.

Answer 8

Jay P is correct in that zero gravity is really a free fall state and the only way to induce that state (currently) is by the use of a plane that has steep climbs and dives.

Answer 9

Go outside right now and jump up in the air. For the barest instant before you start falling back to Earth you'll experience "zero gravity."

Answer 10

the only way to experiancy zero gravity on earth is by flying on a special plain called the vomit comet which flys up then dives down very quickly lasting for approx 30sec to 1min.

Answer 11

It takes place while you're swimming. Try diving down in a muddy river. I touched the bottom of a local river and when I tried to surface I was lost , it was only the air bubbles going sideways out of my mouth that told me where "up" was.

davee52uk!They have the falling lift in Disneyland, and the passengers don't get squished when it stops.