angular momentum
3
7.2
- noun
- /ˈæŋɡjələr məˈnɛntəm/
- Specialized
:
momento angular
- To calculate the angular momentum of a planet, you must know its moment of inertia and angular velocity.
- orbital angular momentum
- conserve angular momentum
- transfer of angular momentum
Light can have spin angular momentum, or S AM.
- Light can have spin angular momentum, or S AM.
- When I say spin, I mean a quantum mechanical inherent angular momentum of the particle.
- So the cat is conserving angular momentum.
- All our tools of angular momentum don't help us much.
- So if I start spinning and you, you calculate the angular momentum by OK, here it is.
- So essentially things as they, as they spin that angular momentum wants to spread material out into a white disk.
Examples
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Recall that the limiting factor for turning gas into stars was the conservation of angular momentum.
Academic text (2000) -
In the central-force example that Einstein considered, angular momentum is conserved.
Academic text (2005) -
A black hole could have mass, charge, and angular momentum, and that was it.
Academic text (1991) -
Let's start with the angular momentum about the point A.
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However, models also show that the core should have retained most of its original angular momentum.
Academic text (1995) -
A change in seat position was not found to affect the angular momentum of the trunk.
Academic text (1992) -
Mass, magnetic fields, and angular momentum cause the space-time landscape to bend.
Academic text (1996) -
We must find some physical mechanism that takes off most of the slow-spinning asteroids' angular momentum.
Academic text (2000) -
But there's a thing called angular momentum, which is angular mass times angular speed.
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As each photon carries off 2h of angular momentum, the rotation slows down.
Academic text (1995)
Surface Forms
Morphology
Knowing 'angular' (relating to rotation/angles) and 'momentum' (a quantity of motion) lets a learner infer this is a measure of rotational motion — essentially the rotational analogue of linear momentum. However, the precise physical definition and formula (moment of inertia × angular velocity, measurement about an axis) are technical and not predictable from general word knowledge alone, so the expression is only partially transparent.
Etymology
Angular momentum combines angular (about turning or angles) and momentum (the motion you keep while moving). Imagine a spinning skater who pulls in her arms and spins faster; she keeps the same 'turning motion', so angular momentum is the measure of how much turning motion an object keeps.