E_ {k}=\frac {1} {2}*\frac {m_ {r}^ {2}} {m}*\omega^ {2}=\frac {1} {2}*\frac {m_ {r}^ {2}} {m}*\frac {v^ {2}} {r^ {2}}=\frac {1} {2}*m*v^ {2} 由于刚体转动中的 v 为外沿的转动速度,因此有 v=\omega*r 。 牛顿米 (n·m)和牛顿/米 (n/m)虽然都是物理学中常见的单位,但它们代表的物理量和用途有所不同。 首先,牛顿米 (n·m)是力矩的单位,它是力和力臂的乘积,用于衡量物体旋转.
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