现在我们讲讲匀速圆周运动。
什么是匀速圆周运动？
今天我们将讨论，我们所说的“匀速圆周运动。”
Today we will discuss what we call "uniform circular motion."
从匀速圆周运动来看。
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.
先前在讲行星时,我们讨论过这个，我们讨论的是,匀速圆周运动，而且我们评估了,向心加速度。
We have discussed that earlier when we dealt with the planets, and we dealt with uniform circular motions, and we evaluated the centripetal acceleration.
推证出了真空中带电粒子做低速匀速圆周运动时辐射波的E、H表示式，并讨论了辐射波的各种偏振状态。
This paper proves representatives of E and H to radiation field producing by low-velocity uniform Circular motion charge in vacuum and then discusses various states of polarization to radiation field.
详细讨论了当向心力突然增大后，原来作匀速圆周运动的小球其运动轨迹的变化情况，证明了小球将作螺线运动。
A small ball is making circular motion at the uniform velocity, the centripetal force has suddenly increased, it is proved that the small ball will generally make a spiral motion.
详细讨论了当向心力突然增大后，原来作匀速圆周运动的小球其运动轨迹的变化情况，证明了小球将作螺线运动。
A small ball is making circular motion at the uniform velocity, the centripetal force has suddenly increased, it is proved that the small ball will generally make a spiral motion.
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