匀速圆周运动发生在，当物体沿着一个圆环滚动，速率恒定的情况下。

Uniform circular motion occurs when an object goes around in a circle and when the speed never changes.

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在无扰动惯性运动中，角动量是恒定的。

In undisturbed inertial motion, the angular momentum is constant.

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空气的运动是恒定的。

The motion of the air is constant.

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The angle is increasing at a steady rate, so we know it's going at a steady speed.

转过的角度以恒定速率增加,所以我们知道它以一个恒定的速度运动

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This particle is constantly changing its direction, but it therefore has an acceleration and the acceleration, we have shown here, is pointing towards the center.

这个质点恒定地改变它的运动方向,因此它具有加速度,而且这个加速度,我们前面也讲过了,指向圆心

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We said, "Let's take, for the simplest case that we can possibly imagine, namely a particle moving in one dimension along the x-axis with a constant acceleration a.

我们说过,"考虑我们可以想象的最简单的情况,即质点在一维空间运动,沿着 x 轴且保持恒定加速度 a

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