“conservation of angular momentum”的概念、定义、翻译、参考文献-科学参考

conservation of angular momentum

Mathematics

When a particle is acted on by a central force, the angular momentum of the particle about the centre of the field of force is constant for all time. This fact is called the principle of conservation of angular momentum.

Similarly, when the sum of the moments of the forces acting on a rigid body about a fixed point (or the centre of mass) is zero, the angular momentum of the rigid body about the fixed point (or the centre of mass) is conserved. See also Noether’s theorem.

Geography

The momentum of a body taking a curved path is angular momentum. A body’s angular momentum will remain constant unless changed by some force. This is important in understanding jet streams; a body of air at the equator will move at the same speed as the Earth. When this body of air moves polewards, it must increase its velocity to maintain its angular momentum, since Earth’s radius decreases polewards. At 30°, for example, the air moves very much faster than the Earth below (which is much slower than at equatorial speed). This very fast-moving stream of air is a jet stream.

单词	conservation of angular momentum
释义	conservation of angular momentum Mathematics When a particle is acted on by a central force, the angular momentum of the particle about the centre of the field of force is constant for all time. This fact is called the principle of conservation of angular momentum. Similarly, when the sum of the moments of the forces acting on a rigid body about a fixed point (or the centre of mass) is zero, the angular momentum of the rigid body about the fixed point (or the centre of mass) is conserved. See also Noether’s theorem. Geography The momentum of a body taking a curved path is angular momentum. A body’s angular momentum will remain constant unless changed by some force. This is important in understanding jet streams; a body of air at the equator will move at the same speed as the Earth. When this body of air moves polewards, it must increase its velocity to maintain its angular momentum, since Earth’s radius decreases polewards. At 30°, for example, the air moves very much faster than the Earth below (which is much slower than at equatorial speed). This very fast-moving stream of air is a jet stream.
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