Al mechanics problem
2007-05-30 9:29 pm
Given that thr universal gravitational constant is 6.7x10^-11Nm^2kg^-2 and the radius of the earth is 6.4x10^6 m,what is the average density of the earth?
回答 (1)
2007-05-30 9:39 pm
✔ 最佳答案
We have to also use the figure g = 9.81 m/s2 which is the free fall acceleration due to gravity at the earth's surface.Also let:
M = mass of the earth
m = mass of an object near earth's surface
Then the deductions are as follows:
圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/May07/Gravitation.jpg
參考: My physics knowledge
收錄日期: 2021-04-13 00:33:27
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