# Universal Gravitation Constant - HELP

## Main Question or Discussion Point

Universal Gravitation Constant - HELP!!

Hello, I'm a little confused...

What is the difference between the "Constant of Universal Gravitation" and the "Gravitational Force"? I know that there is a radius between two or more objects like the Earth and the Moon and bla bla bla... But the thing that I wanna know is the "Constant of Universal Gravitation". Is it the force between the two objects??

I would be grateful if someone could answer my question!

Thanks!

## Answers and Replies

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Gold Member
Force between moon earth and blah blah is

$F=\frac{Gm1m2}{d2}$

F is the force. G is the universal gravitational constant

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What is the difference between the "Constant of Universal Gravitation" and the "Gravitational Force"?
Force is variable (something you compute) depending on the masses and the distance between the masses. The constant is, well a constant.

But the thing that I wanna know is the "Constant of Universal Gravitation". Is it the force between the two objects??
No, it's a universal constant, G ≈ 6.67 x 10-11 Nm2/kg2. See Gravity (HyperPhysics) and/or Gravitational constant.

Andrew Mason
Homework Helper
Hello, I'm a little confused...

What is the difference between the "Constant of Universal Gravitation" and the "Gravitational Force"? I know that there is a radius between two or more objects like the Earth and the Moon and bla bla bla... But the thing that I wanna know is the "Constant of Universal Gravitation". Is it the force between the two objects??

I would be grateful if someone could answer my question!

Thanks!
Newton's law of gravitation essentially says that gravitational force between two bodies is proportional to the product of their masses divided by the square of the separation between their centres of mass (mM/r^2). G is the proportionality constant relating the magnitude of the force to mM/r^2. In math terms, G is equal to the Force divided by (mM/r^2).

AM