Because, first, the moment of inertia affects rotational motion in the same way that mass affects translational motion.

它们以相同的方式影响旋转运动 质量影响平移运动。

The farther away the mass is from the axis of rotation, the higher the object's moment of inertia.

质量离旋转轴越远， 物体的转动惯量值越高。

… the moment of inertia relates to mass, too, but it depends on how that mass is distributed.

...转动惯量也与质量有关， 但这取决于质量分布。

The net torque on an object is equal to its angular acceleration, times what's known as its moment of inertia.

物体上的合成扭矩等于它的加速度 角撞击称为惯性矩。

Well, there's also angular momentum, which is equal to an object's moment of inertia times its angular velocity.

那么还有角动量，等于 因为物体的惯性矩乘以它的角速度。

So, the kinetic energy of an object's rotational motion is just half of its moment of inertia, times its angular velocity squared.

所以物体旋转运动的动能是 惯性矩的一半乘以其角速度的平方。