• Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
  • Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
  • Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
  • Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
  • Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
Japanese car seat storage car storage hanging bag fixed net car storage net bag in-car children's products
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Question: 一辆小车静置于光滑水平面上.车的左端固定有一个...

Answer: 答:车与弹丸组成的系统动量守恒,开始系统静止,总动量为零,发射弹丸后,弹丸动量向右,由动量守恒定律可知,车的动量向左,车向左运动,从发射弹丸到弹丸落入网兜过程,系统动量守恒,由于初动量为零,则弹丸落入网兜后,系统总动量为零,弹丸落...

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