How To Find Angular Momentum

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Welcome to my article on finding angular momentum! As a physics enthusiast, understanding the concept of angular momentum has always been fascinating to me. In this article, I will delve into the details of how to calculate angular momentum and provide some personal insights along the way. So, let’s jump right into it!

Understanding Angular Momentum

Angular momentum is a fundamental concept in physics, especially in the study of rotational motion. It is defined as the product of moment of inertia and angular velocity of a rotating object. Mathematically, angular momentum (\(L\)) can be expressed as:

L = I * ω

where \(I\) is the moment of inertia and \(ω\) is the angular velocity.

Finding the Moment of Inertia

To calculate angular momentum, we first need to determine the moment of inertia of the rotating object. The moment of inertia (\(I\)) depends on the mass distribution and the shape of the object. For simple geometric shapes such as rods, discs, and spheres, there are specific formulas to calculate \(I\).

Calculating Angular Velocity

Once we have determined the moment of inertia, the next step is to find the angular velocity (\(ω\)) of the rotating object. Angular velocity is the rate of change of angular displacement with respect to time. It is measured in radians per second (\(rad/s\)).

Putting It All Together

With the moment of inertia and angular velocity in hand, we can now calculate the angular momentum using the formula \(L = I * ω\). This provides us with a quantitative measure of the rotational motion of the object.

Personal Insights

I find the concept of angular momentum to be truly captivating. It represents the rotational “motion in action” and offers a profound understanding of how objects move and interact in the physical world. The ability to calculate and comprehend angular momentum enhances our comprehension of various natural phenomena, from spinning tops to planetary motion.


In conclusion, the calculation of angular momentum involves understanding the moment of inertia, angular velocity, and their interplay in rotational motion. By applying the formula \(L = I * ω\), we can quantify the rotational dynamics of a system. Through this article, I hope I’ve been able to shed light on this intriguing aspect of physics and inspire others to explore the wonders of angular momentum.