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> 下列说法中正确的是（　　） A．钉钉子时不用橡皮锤，是因为橡皮锤太轻 B．推车时车未被推动，是因为车所受的合外力的总冲量为零 C．跳高时，在沙坑里填沙，是为了减小人着地时所受的冲量 D．动量相同的两个物体受相同的制动力作用，质量小的先停下来

问题：

发布时间：2024-09-11

下列说法中正确的是（　　）

A．钉钉子时不用橡皮锤，是因为橡皮锤太轻

B．推车时车未被推动，是因为车所受的合外力的总冲量为零

C．跳高时，在沙坑里填沙，是为了减小人着地时所受的冲量

D．动量相同的两个物体受相同的制动力作用，质量小的先停下来

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