gc textbook chapter 7 Linear Momentum (id: 69389e324)

本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 通用国际物理

[填空题]
A 95-kg halfback movin1ncm3e h(ogd3jk)2 a fgrvch7 y xdoxg ,3-o:.o at $4.1 \; m/s$ on an apparent breakaway for a touchdown is tackled from behind. When he was tackled by an 85-kg cornerback running at $5.5 \; m/s$ in the same direction, what was their mutual speed immediately after the tackle?    $m/s$

参考答案: 4.8±2%


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