Gravity

The Wikipedia lists a gravitational acceleration of 0.003 9 m/s2. I am quite sure this is an estimate or calculation, and has never actually been measured. For comparison, Earth's gravitational acceleration is 9.8 m/s2.

A weak gravity would not be able to hold onto an atmosphere because the gas molecules would escape into space. Without an atmosphere, there would be no protection from cosmic radiation or meteoroids, making it inhospitable for life as we know it.

Really none, there is no actual planet that has the exact same gravity, some can be close, like saying it Gforce was 2000, and another was 2000, but actually its like 2000.01010203053232 and 2000.21020103020310.

Mars and Venus are roughly the same size as earth (and thus have about the same gravity), but I don't think any planet in our solar system is exactly the same as earth. Gravity is determined by mass; the planet in our solar system with a mass closest to earth is Venus.

Venus' gravity is 8.87 ms-2 whereas the Earth's gravity is 9.86 ms-2. Mars's gravity is 3.71 ms-2.

Of the eight planets that orbit the Sun, Jupiter has the strongest gravitational pull because it has more mass than any of the other planets. In fact, it has more mass than ALL the other planets combined!

That is called "tides".

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Sort of. The Moon doesn't really orbit the Earth. Rather, the Earth and the Moon BOTH orbit the "common center of mass" of the Earth/Moon system. That common center of mass is inside the Earth, but not AT the center of the Earth. (If the common center of mass or 'center of gravity' were outside the Earth and somewhere in between the Earth and the Moon, then technically the Moon wouldn't be a "moon"; it would be a co-planet with Earth.)

Tides are actually caused by the fact that the water on the far side of the Earth and the water on the near side of the Earth (with respect to the Moon) are technically in the "wrong" orbits around the Moon. Remember, gravity goes both ways! The water on the far side of the Earth is orbiting too fast and should move into a higher orbit; the water on the near side is orbiting too slowly and should fall into a lower orbit, from the perspective of the Moon. Because the Earth's gravity is much stronger than the Moon's gravity, the effects are actually quite small.

The gravity on Callisto, one of Jupiter's moons, is about 0.126 times that of Earth's gravity, or approximately 1.24 m/s^2. This low gravity is due to Callisto's relatively small size and mass compared to Earth.

YES for example if you stand on water you fall so it does and if your still saying does it work in the water well if i put your feet 5 centimeters in water you would still fall down.

There is no gravity in a space shuttle, unless its on the ground.

The technology of "Gravity Coils" which generate artificial gravity has not been developed. Inducing a feeling of gravity like the old scifi movies "big wheel" space stations only works for very large structures

== Answer 1 == Put simply, it keeps everything in place. Without gravity,water, people, animals, and everything not attracted towards Earth & would drift off into space. '''Answer 2''' 9.9 m/s2 at sea level

Venus has weaker gravity than Earth. The surface gravity on Venus is about 91% of Earth's gravity.

The speed of gravity can not be measured because it does not move instead it is a field denting space and time

Gravity does not have a speed but at the Earth's surface it produces an acceleration of 9.08 metres per second per second on a falling object. In other words an object that is dropped will after one second be travelling at 9.08 m/s

The surface gravity of Pluto's moon Charon is around 0.278m/sec2. Compared with Earth gravity of 9.81 m/sec2, it is around 0.028g or 2.8% of earths gravity.

Dear Wiki Questioner,

According to Newton's Law of Universal Gravitation:

A=G(m/r^2)

Where A is the acceleration of an object due to gravity

G is the gravitational constant [about 6.67x 10^(-11)m^3kg^(-1)s^(-2)]

m is the mass of the planet [about 6.4x10^23 kg for Mars)

and r is the radius of the planet [about 3.4 x10^6 meters for Mars]

So for Mars, the Acceleration of an object near its surface due to gravity is approximately:

A=6.67x 10^(-11) x 6.4x 10^23 / (3.4x 10^6)^2 meters per second squared

Which comes out to about: 3.7 meters per second squared

Since the acceleration due to gravity of an object on earth's surface is about:

9.8 meters per second squared = one "g"

Mars' gravity is about 38% of earth's gravity or .38g

Gravity was first described by Sir Isaac Newton in the 17th century. Although the term "gravity" itself was not coined by Newton, it was his research and explanations that led to the identification and understanding of this force.

At what speed ? At what distance ? Between what masses ?

The question is lacking in specifications.

But it doesn't really matter, because gravity is a real force,

but centrifugal force is not a real force. So you would have to

say that gravity is stronger.

Callisto, one of Jupiter's moons, has a surface gravity of about 0.126 times that of Earth, or 1.235 m/s². This means that objects on Callisto weigh less than they would on Earth due to the weaker gravitational force.

The larger the object, the more 'space' is displaced, and thus, the greater the gravity. The Moon displaces less 'space' than the Earth, so the Moon has less gravity. The space station displaces very little space AND its' shape does not lend itself to taking advantage of the spacial displacement, so it doesn't result in very much gravity.

Stand in a swimming pool and hold a beach ball under the water: the pressure of the water on the ball is a simulation of gravity. Hold a tennis ball under the water: far less pressure, yes? Now, hold something with the exact same collective mass as the beach ball (lets say one of those 'noodle' things the kids play with) and you'll have far less pressure on it than on the beach ball. Why? It has the same mass as the beach ball, so why isn't there the same amount of pressure (gravity) on it? Because the 'shape' of it does not lend itself to take advantage of the gravitational pressure.

Gravity can, however, be simulated with inertia. If the ship spins... centripical force and all that.

No. Gravitational attraction is a function of the mass of the Earth and the mass of the body being attracted. The mass of the Earth is the same, no matter where one is located. However, the rotation of the Earth does exert centrifugal force upon bodies on the surface, and that force is greatest at the equator, diminishing as one approaches the poles. Centrifugal force would tend to reduce the measured weight (but not the mass or the gravitational attraction) of a body close to the equator.

The Moon is the "prime mover" of the tides. Although the mass of the Sun is ginormous compared to that of the Moon, it is much farther away from the Earth. In addition, the differentialeffect the sun has across the surface of the Earth is much lower. This translates into the Sun having only about 45% of the effect on tides that the Moon has. Use the link below to dig deeper.i love u soooooooo much to whoever reads this (lol)!!!!!!!!!!!!!!!!

I've heard that on Mars, a person's apparent weight would be about one-third of their weight on Earth. So a 180-lbs man would feel as though they are only 60-lbs. Or a 90kg man would feel like they weighed only 30kg.

On the Moon, this is even less, at one-sixth that of Earth. So the 180lbs man would feel like they weighed 30lbs. The 90kg person would feel like they weighed 15kg.

As a rocket takes off, the gravitational attraction remains constant because gravity is a fundamental force that is determined by the mass of the objects and the distance between them. However, as the rocket gains altitude, the force of gravity weakens slightly due to the increase in distance from the center of the Earth, as described by Newton's law of universal gravitation.

if we were to be on uranus the gravity would be 89% of what we get on earth.

Because earth is more massive than the moon. Mass and gravity are positively correlated; the more mass a body has, the stronger its gravity.

1. the earth is larger then the moon and it has electic forces that allow the gravity to be much stronger on the earth then on the moon.

2. the more mass the object has the stronger force of gravity is has

3. if the earth had no gravity there would be no human existence, the moon wouldn't exist and even our plant would exist, the formation of the earth occurred due to the gravitation pull of the magnetic polls on the earth.

Mercury, because it's the smallest if you don't consider Pluto to be a planet.