They deduced the center of mass between the two heavyweights and found that Andromeda may indeed be twice as massive as the Milky Way.

他们根据二者的重量级推导出，现仙女座也许真的是银河系的2倍。

If the big kid is two times as heavyas the little kid, then their mutual center of mass will be two times closer to the big kid than to thelittle kid.

如果大孩子的重量是小孩子的2倍，那么的位置离大孩子的距离就比离小孩子距离近2倍。

In reality, both circle around their mutual center of mass, located between the two.

事实上，两者都围绕着位于两者之间的相互旋转。

These are sets of two stars that orbit around a common center of mass.

即由两颗恒星组成的组合，们围绕一个共同的运行。

And if you think about that, that makes a great deal of sense because as a prey is attacked, such as a whale, and it tries to turn, it's going to turn around its center of mass.

如果想一下，这非常合乎情理因为要是像鲸这样的猎物遭到攻击，就会试图转向，这种旋转会以为轴。

Centripetal acceleration is equal to V squared over R. This V squared is for the center of mass of something moving around an axis.

向加速度等于速度的平方除以半径。速度的平方是指绕轴运动物体的。

Timing and smooth execution are essentials in a sport but understanding enough physics, particularly the torques in the center of mass is also necessary.

在一项运动中，时机和流畅的执行是必不可少的，但了解足够的物理，特别是的扭矩也是必要的。

With a low center of mass, the wheel just swings back and forth like a pendulum, then stops.

当较低时，车轮就像钟摆一样来回摆动，停止。

And yet, collected together, they have a single total amount that they spin about their center of mass.

但聚集在一起时，们有一个单一的总的不变量，他们总是围绕着们的旋转。

There's a simple way to figure out where the center of mass is.

有一个简单的方法找出。

Within a given supercluster, all galaxy motions will be directed inward, toward the center of mass.

而在超星系团内部，所有星系都是向内部运动。

The moving parts that make one side of the wheel heavier also shift its center of mass downward below the axle.

使车轮一侧更重的运动部件也将其向下移至车轴下方。

The stars all orbit the cluster's center of mass, even though there may not be anything at the very center.

所有的恒星都围绕着星团的旋转，即使在最中可能没有任何东西。

The answer is in the center of mass.

答案就是。

The 1.52 meters is how much her center of mass is raised above its landing point.

52 米是她的比着陆点高出多少。

To make the seesaw work, theheavy kid must push that center of mass forward until it just touches the pivot.

要想让跷跷板摇动，重的孩子就得往中间挪直到移到中。

Three times heavier and the center of mass will be three times closer. And so on.

重三倍，的位置就进三倍，以此类推。

So the reason the heavy kid sits on the ground while the light kid is up in the air is that theirmutual center of mass is on the heavy kid's side of the pivot.

因此，重的小孩坐在地上而轻的小孩悬在空中的原因是，他们共同的在重的孩子这边。

The center of mass is a pointsomewhere along the plank that holds the two kids where their average weight falls.

是跷跷板上支撑两个孩子平均重量的一个点。

If it was spanning six seconds, you would multiply the center of mass by six.

如果持续了六秒，你会将乘以六。