What is the equation used to calculate the gravitational force between two objects with mass?

The equation used to calculate the gravitational force between two objects with mass is given by Newton's law of universal gravitation. The equation is:

F = (G * m1 * m2) / r^2

where:
F is the gravitational force between the objects,
G is the gravitational constant (approximately 6.67430 × 10^-11 N(m/kg)^2),
m1 and m2 are the masses of the two objects,
r is the distance between the centers of the two objects.

To calculate the gravitational force, you will need to know the values of the masses of the two objects and the distance between their centers. The gravitational constant is a constant value that is given, so you do not need to calculate it.

Simply substitute the values into the equation, multiply the masses together, divide by the square of the distance between the objects, and then multiply by the gravitational constant to compute the gravitational force between the two objects.