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I deduced that the forces which keep the planets in their orbs must be reciprocally as the squares of their distances from the centers about which they revolve; and thereby compared the force requisite to keep the Moon in her orb with the force of gravity at the surface of the Earth; and found them answer pretty nearly |
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c_xg123
铁杆木虫 (著名写手)
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6楼2009-11-29 20:09:46
zcy86520
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2楼2009-11-29 13:13:02
3楼2009-11-29 13:26:31
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phyweiw(金币+10,VIP+0):嘿嘿，正解，这是牛顿说的原话，呵呵。 11-29 14:13
phyweiw(金币+10,VIP+0):嘿嘿，正解，这是牛顿说的原话，呵呵。 11-29 14:13
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I deduced that the forces which keep the planets in their orbs must be reciprocally as the squares of their distances from the centers about which they revolve; and thereby compared the force requisite to keep the Moon in her orb with the force of gravity at the surface of the Earth; and found them answer pretty nearly 本人推断将行星保持在轨道上的力肯定与它们和旋转围绕中心之间距离的平方成反比;因此对比将月球保持在轨道上所必需的力和地球表面的重力,会发现他们的答案差不多 |
4楼2009-11-29 13:53:43