a bullet fired from a rifle.

a bullet fired from a rifle.
a football quarterback running at top speed
a horse walking at about 2miles/hour
哪个动量最大?

越爱越ee 1年前已收到1个回答举报

共回答了25个问题采纳率：96% 举报

1.从枪膛射出的子弹；
2.一个足球四分位运动员的最高奔跑速度
3.一匹马行进速度为2英里/小时
1.如果子弹重量为0.1kg,出膛速度为1000m/s,则动量为100
2.如果足球运动员重70kg,最高速度为8m/s,则动量为560；
3,如果马重200kg,速度为1m/s,则动量为200.
所以我选2.

1年前

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你能帮帮他们吗

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