已知g,可以通过m = g/g来求得质量m,其中g是重力加速度,等于9.8牛顿每千克(n/kg)。 因此,1kn等于1000牛顿除以9.8牛顿每千克,结果是102.04公斤。 2. 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 。
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