How do you maesure the mass of the Earth?

Answer 1

Weight is the product of

(mass) multiplied by (the acceleration of gravity on the planet where the mass is).

On or near the earth's surface, the acceleration of gravity is 9.8 meters per second2 .

Answer 2

An object's weight is the force of gravity between the object and another mass.

That's why your weights on Earth, on the Moon, on Mars, and on other planets

are all different numbers. An object's weight depends on its own mass AND on

the mass of the other object with which it is mutually attracted. (And also on the

distance between them.) It also helps to remember that the gravitational force

between the two objects is the same in both directions.

So in order to nail down the weight of the Earth, you have to specify what the

other object is, and how far apart they are.

For example, if the other object is me, and the distance between our centers of

mass is the radius of the Earth (because I'm standing on its surface), then my

weight on Earth is 190 pounds, and the Earth's weight on me is also 190 pounds.

Here's the formula to calculate the weight of any object in the neighborhood of the

Earth. That's exactly what you want, because the Earth's weight in the neighborhood

of that object is exactly the same force:

Weight = (3.987 x 1011) x (mass of the other object, in kg) / (distance between their centers, in km)2

The answer will be in newtons. If you want it in pounds, divide the newtons by 4.448 .

Answer 3

Ancient Greek astronomer and mathematician Eratosthenes calculated the size of the Earth by noting that on a particular date, the the noon-time Sun would shine straight down to the bottom of a deep well. On that same date but in a different city many miles away, the noontime Sun would shine down at an angle of a few degrees. Assuming that the Sun's rays were all parallel, he was able to calculate the size of the Earth.

His calculations were off by about 1%.

Please note that this also proves that Eratosthenes, in 240 BC, knew that the Earth was spherical; otherwise, the math wouldn't have made sense!

Answer 4

weight = mass x gravity. Using SI units, the weight on Earth (in Newton) is equal to the mass (in kilogram) times the gravity (9.82 meters / second2).

weight = mass x gravity. Using SI units, the weight on Earth (in Newton) is equal to the mass (in kilogram) times the gravity (9.82 meters / second2).

weight = mass x gravity. Using SI units, the weight on Earth (in Newton) is equal to the mass (in kilogram) times the gravity (9.82 meters / second2).

weight = mass x gravity. Using SI units, the weight on Earth (in Newton) is equal to the mass (in kilogram) times the gravity (9.82 meters / second2).

Answer 5

If you know your own mass, it couldn't be easier. The force of gravity

between two masses is

F = G m1 m2 / R2 .

The force between you and the earth is the number you call your 'weight', so the formula

says that your weight is (Gravitational constant) x (earth mass) x (your mass) / (earth radius)2 .

You can find the gravitational constant and the earth radius in any high school Physics book.

Then, just divide 'F' by [ G x (your mass) / (earth radius)2 ], and you have the mass of the earth.

Answer 6

The mass of a body cannot be mathematically calculated, it has to be determined using apparatus such as the Triple Beam Balance.

Once the mass of an object is known, its weight can be calculated. The weight of an object is the product of its mass and the acceleration due to gravity on the planet.

Answer 7

weight = mass x gravity. Using SI units, the weight on Earth (in Newton) is equal to the mass (in kilogram) times the gravity (9.82 meters / second2).

Answer 8

to what?