英语翻译an astronaut drops a rock from the top of a crater on th
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英语翻译
an astronaut drops a rock from the top of a crater on the moon.When the rock is halfway down to the bottom of the carter,its speed is what fraction of its final impact speed?完全不会做……
an astronaut drops a rock from the top of a crater on the moon.When the rock is halfway down to the bottom of the carter,its speed is what fraction of its final impact speed?完全不会做……
![英语翻译an astronaut drops a rock from the top of a crater on th](/uploads/image/z/77618-2-8.jpg?t=%E8%8B%B1%E8%AF%AD%E7%BF%BB%E8%AF%91an+astronaut+drops+a+rock+from+the+top+of+a+crater+on+th)
一名宇航员从月球的陨石坑的顶部丢下一块岩石.当岩石走在大坑底的一半时,它的速度是最终撞击的几分之几?
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