A space ship leaves the earth with a speed of 1.5x10*4 ms*-1 and coast until some time later when it strikes the moon.
1. how fast was it going just before it struck the surface of the moon?
2. how much work you have to do if you bring a rock of 3kg from the moon's surface back to earth?
phy.gravitation F.6
2008-10-29 5:32 am
回答 (1)
2008-10-30 3:27 am
✔ 最佳答案
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圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn03Oct291925.jpg?t=1225279617
參考: Myself~~~
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