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单词 Conservation of Angular Momentum
释义

Conservation of Angular Momentum

原声例句
双语版 TED-Ed 演讲精选

That's called conservation of angular momentum.

这称为「角动量守恒定律」。

PBS地球-气候变幻

That's called the conservation of angular momentum.

- 这就是所谓的角动量守恒。

SciSHow 快问快答小科普

This is because of a principle called conservation of angular momentum.

这是因为称为角动量守恒的原理。

Vox 观点

It seems to be able to right itself by flipping in the air without pushing off anything first, which would contradict the law of conservation of angular momentum.

它似乎能够通过在空中翻转而不首先推动任何东西来调整自己,这与角动量守恒定律相矛盾。

SciSHow 快问快答小科普

But the reason it’s moving away also explains why it will never leave us—a principle known as the conservation of angular momentum.

但它离开的原因也解释了为什么它永远不会离开我们——一个被称为角动量守恒的原理。

中文百科

角动量 Angular momentum

(重定向自Conservation of Angular Momentum)

角动量在物理学中是与物体到原点的位移和动量相关的物理量,在经典力学中表示为到原点的位移和动量的叉积,通常写做\mathbf{L}。角动量是矢量。

其中,\mathbf{r}表示质点到原点的位移,\mathbf{L}表示角动量。\mathbf{p}表示动量。而\mathbf{r}又可写为:

其中I表示杆状系统的转动惯量,ω是角速度矢量。

在不受非零合外力矩作用时,角动量是守恒的。需要注意的是,由于成立的条件不同,角动量是否守恒与动量是否守恒没有直接的联系。

角动量在量子力学中与角度是一对共轭物理量。 当物体的运动状态(动量)发生变化表示物体受力作用.且 作用力大小就等于动量\vec{P}的时变率.\vec{F}=\frac{d\vec{P}}{dt}

当物体的转动状态发生改变时, 表示物体受到力矩作用, 而力矩就等于角动量的时变率.\vec{\tau}=\frac{d\vec{L}}{dt}

英语百科

Angular momentum 角动量

(重定向自Conservation of Angular Momentum)
This gyroscope remains upright while spinning due to the conservation of its angular momentum.
Velocity of the particle m with respect to the origin O can be resolved into components parallel to (v//) and perpendicular to (v⊥) the radius vector r. The angular momentum of m is proportional to the perpendicular component v⊥ of the velocity, or equivalently, to the perpendicular distance r⊥ from the origin.
Moment of inertia (shown here), and therefore angular momentum, is different for every possible configuration of mass and axis of rotation.

In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational analog of linear momentum. It is an important quantity in physics because it is a conserved quantity – the angular momentum of a system remains constant unless acted on by an external torque.

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更新时间:2025/6/19 12:01:48