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範例:動量守恆與相對運動(一)[85日大]

一質量為55公斤的人,手持5.0公斤的球,乘坐在一質量為20公斤的車子上,車子在平直光滑的軌道上以2.0公尺/秒的速度前進。如將球沿車行方向水平拋出,球拋出的瞬間相對於人的速度為8.0公尺/,則球拋出後車子對地的速度為多少公尺/?[85日大]


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Posted in 多質點系統的質心運動.

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