Conservation of angular momentum

In summary, the conversation discusses the concept of conservation of angular momentum and how it differs from conservation of momentum and energy. The conservation of angular momentum states that there must be no net torque in a system, and this can be used to determine quantitative values. The speaker asks for an example to better understand the concept. Several threads with examples are mentioned as resources for further exploration.
  • #1
magnas
3
0
Hi,
I am by now very used to the concept of conservation of momentum and energy, however i had never solved a problem using the conservation of angular momentum.
Well, in the case where angular momentum is conserved, we do not have a torque net. But, how this conservation law helps us to determine quantitatively ?
Could you illustrate the concept with an example?
Thank you very much.
 
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  • #2

What is conservation of angular momentum?

Conservation of angular momentum is a fundamental law of physics that states that the total angular momentum of a system remains constant, unless acted upon by an external torque. This means that the angular momentum of a system cannot be created or destroyed, but can only be transferred between different parts of the system.

How is angular momentum calculated?

Angular momentum is calculated by multiplying the moment of inertia (a measure of an object's resistance to rotational motion) by the angular velocity (the rate at which the object is rotating). The formula for angular momentum is L = Iω, where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

What are some real-life examples of conservation of angular momentum?

One example of conservation of angular momentum is the motion of a spinning top. As the top spins, its angular momentum remains constant, even as it starts to wobble. Another example is the orbit of planets around the sun. The planets' angular momentum remains constant, allowing them to maintain their orbit without being pulled into the sun.

How does conservation of angular momentum apply to rotational motion?

Conservation of angular momentum applies to rotational motion by stating that the total angular momentum of a system must remain constant. This means that as an object spins, its angular momentum cannot change unless acted upon by an external force, such as friction or an applied torque.

What are some real-life applications of conservation of angular momentum?

Conservation of angular momentum has many practical applications, such as in the design of spinning objects like gyroscopes and flywheels. It is also important in understanding the motion of rotating objects, such as the Earth's rotation and the motion of satellites in orbit. Additionally, the principle of conservation of angular momentum is used in engineering and design to ensure the stability and balance of rotating systems.

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