该物体质量为。
L The rod has mass m and it has length l.
杆子质量为M，长度为。
The mass m is assumed to be constant.
我们假设质量m是不变的。
There's an object mass little m going in a circle around capital M.
质量是小m的,物体围绕着,大M作圆周运动。
In the most simple case that I can think of, I have here a block m which has a certain mass, m.
在最简单的示范中，我有一个大块，它的质量为。
In the most simple case that I can think of, I have here a block m which has a certain mass, m.
在最简单的示范中，我有一个大块，它的质量为。
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