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Name: arthur
Status: other
Grade: other
Location: MN
Country: N/A
Date: June 2006

Question:
When Newton discovered his law of gravity, how did he write the formula in 1666 before G was discovered in 1798. Is F=m1m2/d2 correct, and where (what chapter and/or page) in his Principia did he actually write it down.



Replies:
With a G. He did not know the value of G (Cavendish figured this out), but he knew there must be a constant of proportionality.

Nathan A. Unterman



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