Enter the initial angular momentum (kg-m^2/s) and the change in angular momentum (kg-m^2/s) into the Calculator. The calculator will evaluate the Final Angular Momentum. 

Final Angular Momentum Formula

pf = pi + dp

Variables:

  • pf is the Final Angular Momentum (kg-m^2/s)
  • pf is the initial angular momentum (kg-m^2/s)
  • pi is the change in angular momentum (kg-m^2/s)

To calculate Final Angular Momentum, add the change in momentum to the initial momentum.

How to Calculate Final Angular Momentum?

The following steps outline how to calculate the Final Angular Momentum.


  1. First, determine the initial momentum (kg-m^2/s). 
  2. Next, determine the change in momentum (kg-m^2/s). 
  3. Next, gather the formula from above = pf = pi + dp.
  4. Finally, calculate the Final Angular Momentum.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

initial momentum (kg*m/s) = 45

change in momentum (kg*m/s) = 70

Frequently Asked Questions

What is Angular Momentum?

Angular momentum is a measure of the quantity of rotation of an object and is a vector quantity. It depends on the mass, velocity, and the distance of the object from the point about which it is rotating. Its SI unit is kilogram meter squared per second (kg-m^2/s).

How does Angular Momentum differ from Linear Momentum?

While linear momentum is a measure of an object’s translational motion, angular momentum deals with rotational motion. Linear momentum is dependent on mass and velocity, whereas angular momentum also takes into account the distance from the rotation axis.

What is the Principle of Conservation of Angular Momentum?

The principle of conservation of angular momentum states that if no external torque acts on a system, the total angular momentum of the system remains constant. This principle is widely used in physics to solve problems related to rotational motion.

How can Angular Momentum be changed?

Angular momentum of an object can be changed by applying an external torque. The change in angular momentum is equal to the torque applied times the time interval for which it is applied. This is also known as the angular impulse-momentum theorem.