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Weight depends on measuring the attraction between two objects, such as a person
and the Earth. It is actually a mutual attraction between their masses. The mass of
the Earth, however, can be calculated from its gravity.
Mass of the EarthNewton showed that, for spherical objects, you can make the simplifying assumptionthat all of the object's mass is concentrated at the center of the sphere. The following
equation expresses the gravitational attraction that two spherical objects have on one another:
F = G * M1 * M2 / R2
R is the distance separating the two objects.
G is a constant that is 6.67259x10-11m3/s2 kg.
M1 and M2 are the two masses that are attracting each other.
F is the force of attraction between them.
Assume that Earth is one of the masses (M1) and a 1-kg sphere is the other (M2).
The force between them is 9.8 kg*m/s2 -- we can calculate this force by dropping
the 1-kg sphere and measuring the acceleration that the Earth's gravitational field
applies to it (9.8 m/s2).
The radius of the Earth is 6,400,000 meters (6,999,125 yards). If you plug all of these
values in and solve for M1, you find that the mass of the Earth is 6,000,000,000,000,000,000,000,000 kilograms (6 x 1024 kilograms), or
6 quintillion metric tons (6 x 1021 tonnes).
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As odd as it sounds, the weight of Earth is exactly zero, because the Earth is in
orbit around the sun, and as such, the Earth is free falling in space around the
sun.1 Any object in free fall in space, including an object in orbit, is weightless.
That is why astronauts are weightless when in orbit around the Earth.
Weight is a characteristic of an object as it relates to the gravitational field it is
resting in. You would have to take the earth to a much more massive world, like
Jupiter, and ignoring the difficulties caused by the gaseous make up of the
planet, put the Earth on a rather large scale to see what the Earth "weighs"
there. Of course, its weight would change based on its distance from the center
of gravity of the attracting object. On Earth, weight changes negligibly at any
altitude within the atmosphere.
The mass of the earth is another matter. The mass of the earth is 5.9736×1024 kg,
or about 5,973,600,000,000,000,000,000,000 Kg.
1 An orbit is a special case of a free fall condition. As the orbiting object falls downwards, it
also travels transversely (sideways) at such a rate that its falling trajectory projects a curve
that always remains the same distance from the planet's surface.
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From a different perspective:
The following experient was performed. Gravitational forces always occur in pairs,
between the centers of two masses, and the two forces are equal, so that the
force between me and the earth is what I call my "weight". If this is generally
correct, then the weight of any object depends on the other object to which
it is gravitationally attracted at the moment, and if that's true, then I can weigh
the earth on me.
In my laboratory, I placed a tiny mirror on the floor. I then took a bathroom scale
out of a cabinet, inverted it, and placed it top-down on the floor, with its digital
display visible in the tiny mirror. I then alighted upon the scale, placing my full
body upon the surface that is normally the bottom of the scale ... the surface
with the label, the rubber feet, and the battery door on it. In this way, I was
able to weigh the earth in my gravitational field, and (just as Sir Isaac might
have predicted) it was precisely equal to myweight when measured in the
earth's gravitational field.
It would seem that in order to accurately quote the earth's weight, the question
must specify the other object to which the earth is being gravitationally attracted,
and must also specify the other object's mass, and the distance between the
centers of mass of the earth and the other object. As any of these details
changes, so too does the earth's 'weight' change!
What else can I help you with?
How do you convert weight on earth to weight on mars?
Multiply Earth weight by 0.379 .
Is the weight of a body constant at all places on the earth?
The weight of a person is not constant at all places on the Earth. The weight becomes zero at the center of the earth or far away from the Earth.
What is the weight of Europa compared to Earth?
Europa's weight is about 13.5% of Earth's weight. This is because Europa has a much lower mass and gravity compared to Earth.
How would you convert your weight on earth to your weight on Saturn?
To convert your weight from Earth to Saturn, you would first calculate your weight on Earth using the equation Weight = Mass x Gravity, then divide that weight by Saturn's gravity (which is about 1.08 times that of Earth). This would give you an estimation of how much you would weigh on Saturn.
What is your weight on Mars compared to Earth?
Your weight on Mars would be about 38% of your weight on Earth. This is because Mars has a weaker gravitational pull than Earth.
How do you convert weight on earth to weight on mars?
Multiply Earth weight by 0.379 .
What is weight of earth?
AS WE KNOW, that there is the force of gravity at the center of Earth, if every part or portion of earth has its weight then net weight of the earth will be zero........
What is your weight for each planet considering the surface gravity?
Based on surface gravity, your weight on each planet would be: Mercury: 38% of your weight on Earth Venus: 91% of your weight on Earth Mars: 38% of your weight on Earth Jupiter: 236% of your weight on Earth Saturn: 113% of your weight on Earth Uranus: 92% of your weight on Earth Neptune: 113% of your weight on Earth These values are approximate and assume a similar mass and body composition.
What is your weight on Mars?
Your weight on Mars would be about 38% of your weight on Earth because Mars has a weaker gravitational pull than Earth.
Is the weight of a body constant at all places on the earth?
The weight of a person is not constant at all places on the Earth. The weight becomes zero at the center of the earth or far away from the Earth.
What is the weight of the body at the center of the earth?
In theory, at the center of the Earth you would have no weight.
What is the weight of Europa compared to Earth?
Europa's weight is about 13.5% of Earth's weight. This is because Europa has a much lower mass and gravity compared to Earth.
How would you convert your weight on earth to your weight on Saturn?
To convert your weight from Earth to Saturn, you would first calculate your weight on Earth using the equation Weight = Mass x Gravity, then divide that weight by Saturn's gravity (which is about 1.08 times that of Earth). This would give you an estimation of how much you would weigh on Saturn.
When he force of gravity on the moon is approximately one sixth that of the earth The direct variation formula for weight on the earth compared to weight on the moon would be?
The direct variation formula for weight on Earth compared to weight on the Moon can be expressed as ( W_m = \frac{1}{6} W_e ), where ( W_m ) is the weight on the Moon and ( W_e ) is the weight on Earth. This indicates that an object's weight on the Moon is one-sixth of its weight on Earth due to the difference in gravitational force. Consequently, if you know an object's weight on Earth, you can easily calculate its weight on the Moon using this formula.
What is the weight of air on earth is called?
The weight of air on Earth is called atmospheric pressure. It is the force exerted by the weight of air molecules in the Earth's atmosphere on a surface.
What is your weight on Mars compared to Earth?
Your weight on Mars would be about 38% of your weight on Earth. This is because Mars has a weaker gravitational pull than Earth.
If a toy has a weight of 1kg what is its earth weight?
The weight of an object on Earth is the same as its mass, which is 1kg in this case. Weight is a measure of the force of gravity acting on an object's mass.
