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.
在纯滚动情况下,Q的速度,和圆周的速度,如果你们看得到-,是相同的。
When we have pure roll, the velocity of this point Q, and the velocity of the circumference, - if you can read that — are the same.
应用推荐