How to Compute Gravitational Force Using Python

Submitted by razormist on Thursday, August 21, 2025 - 22:59.

In this tutorial, we will learn how to program **"How to Compute Gravitational Force Using Python."** The objective is to calculate the gravitational force between two given masses. This tutorial will guide you step by step through the entire process of determining the gravitational force. By the end of this tutorial, you will have a solid understanding of how to implement this task effectively, helping you strengthen your problem-solving abilities and enhance your Python coding skills.

This topic is straightforward to understand. Simply follow the instructions provided, and you will complete it with ease. The program will guide you step by step through the process of calculating the gravitational force. So, let’s dive into the coding process!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

while True:
    print("\n================= Compute Gravitational Force =================\n")
 
    try:
        m1 = float(input("Enter the first mass (kg): "))
        m2 = float(input("Enter the second mass (kg): "))
        r = float(input("Enter the distance between the centers of the masses (m): "))
 
        if m1 <= 0 or m2 <= 0 or r <= 0:
            print("Error: Masses and distance must be positive numbers.")
            continue
 
        G = 6.67430e-11  # Updated gravitational constant
        f = (G * m1 * m2) / (r ** 2)
 
        print(f"\nGravitational Force is: {f:.6e} N")  # scientific notation for small values
    except ValueError:
        print("Invalid input. Please enter numeric values.")
        continue
 
    opt = input("\nDo you want to try again? (yes/no): ").strip().lower()
    if opt == 'no':
        print("Exiting program...")
        break
    elif opt != 'yes':
        print("Invalid choice. Exiting program...")
        break

This Python program calculates the gravitational force between two objects using Newton’s law of gravitation. It prompts the user to enter the masses of the two objects and the distance between their centers, checks that the inputs are valid positive numbers, and then applies the formula $F = G \cdot \frac{m_1 \cdot m_2}{r^2}$, where $G = 6.67430 \times 10^{-11} \, \text{Nm}^2/\text{kg}^2$. The result is displayed in scientific notation for accuracy, and the program runs in a loop so the user can perform multiple calculations until they choose to exit.

Output:

There you have it we successfully created How to Compute Gravitational Force Using Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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