That's the correct equation. But there's no 'g' in that equation. What you need is the gravitational constant G. (Look it up.)physicsgurl12 said:so Fg=G* (m1m2)/r^2
Gravitational force is the attractive force between two objects with mass. It is responsible for keeping objects, like planets, in orbit around larger bodies, such as stars.
The force of gravity between two objects is calculated using the equation F = (G*m1*m2)/r^2, where G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them.
The strength of gravitational force is affected by the masses of the two objects and the distance between them. The greater the masses of the objects, the stronger the force will be. The farther apart the objects are, the weaker the force will be.
Gravitational force follows the inverse square law, which means that as the distance between two objects increases, the force between them decreases exponentially. This means that if the distance between two objects doubles, the force between them will decrease by a factor of four.
Gravitational force is directly related to weight. Weight is a measure of the force of gravity on an object, so the greater the force of gravity on an object, the greater its weight will be. This is why objects weigh less on the moon, where the force of gravity is weaker, than they do on Earth.