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Thread: Gravitational Force

  1. #1 Gravitational Force 
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    Why Earlier Scientists Could Not Guess about gravitational Force?(I am A ninth grade student of Matric so plz give an answer of my level,thanks in advance)


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    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by newton.gravity View Post
    Why Earlier Scientists Could Not Guess about gravitational Force?
    Guess what about gravity?

    And science isn't about "guesses" anyway.

    Newton used the Kepler's laws of planetary motion (based on data about the motion of the planets that Kepler had collected) and realised that the same description of the motion of things on Earth could also apply to the motion of the planets; he showed that Kepler's laws could be derived from his law of gravitation.

    Why did it happen than and not earlier? Well, to some extent, you can always ask that. In this case it took the background information (from Kepler), and someone with the mathematical ability and interest to work it out (Newton).

    A bit more background here:
    Newtonian Gravitation and the Laws of Kepler
    http://www.mtholyoke.edu/courses/mdy.../orb_lect.html

    p.s. I don't know what ninth grade is, so I hope that is the right level!


    ei incumbit probatio qui dicit, non qui negat
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    KJW
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    Quote Originally Posted by Strange View Post
    (based on data about the motion of the planets that Kepler had collected)
    I think the data came from Tycho Brahe.
    There are no paradoxes in relativity, just people's misunderstandings of it.
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    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by KJW View Post
    Quote Originally Posted by Strange View Post
    (based on data about the motion of the planets that Kepler had collected)
    I think the data came from Tycho Brahe.
    Yes, you are right, of course.
    ei incumbit probatio qui dicit, non qui negat
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