# Python Program to Find Gravitational Force between Two Objects

This tutorial is going to show you a simple Python program to calculate the Gravitational Force between two objects.

To find out the gravitational force between two objects, for example, two planets or between a planet and the sun we need some values that are given below:

• Mass of those two objects. We will store these values in the variables `m1` and `m2` for the first and the second object accordingly. In our program, the units of these masses are going to be in KG.
• Distance between the centres of these two objects. `r` is going to be the variable name to store it.
• Gravitational constant which is `6.673*(10**-11)`. We will store it in the variable G.

In our example, we are going to take m1, m2 and r from the user input.

Now let’s see the Python program to calculate the gravitational force:

```m1=float(input("Enter the mass for first object's mass: "))
m2=float(input("Enter the mass for second object's mass: "))
r=float(input("Enter the distance between the centres of the masses of the objects: "))
G=6.673*(10**-11)
f=(G*m1*m2)/(r**2)
print("The gravitational force between these masses is: ",round(f,2),"N")```

Sample output:

`Enter the mass for first object's mass: 9854000Enter the mass for second object's mass: 690984755000Enter the distance between the centres of the masses of the objects: 45898The gravitational force between these masses is: 0.22 N`

As you can see in the above sample output, we have successfully been able to find the gravitational force with the help of a Python program of a few lines.

So what we did do in our program?

I am sure you have got the formula in Physics in high school. The formula is:

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

Where,

• F is the gravitational force
• G is the gravitational constant
• m1 and m2 are the masses of two objects
• And finally, r is the distance between centers of the masses of two objects.