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The Law of Gravity Newton's law of universal gravitation states that the force of gravity (F) between two objects of masses m and M is given by ... F GmM r2 where ris the distance between the two objects and G is Newton's constant. G is very small since gravity is very weak. There are at least two implications to this law of gravity ... THE FIR5T /$A M4THEMATICAL J)f()[JCT/ON OF KtPUr<.'> LAW;; OF PlAN£TAR.Y M077oN - \ \ GRAVITY SUPPLI$ TH£ MISSING THEORE.TICAL ~ -- -- -----~~~ \ \ \ \ .5ECONI>, MY l.A.W GIV£5 THE. /<JGORIJU5 RESULT TJ.IAT PLANET5 TRAVEL ON ELLIPSE$ /<ATH£R 111AN ON CIP...C.U.$ 6
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Newton took several things for granted in his theory. While the earth was no longer the centre of the universe - and had not been so in the eyes of many scientists since Nicolaus Copernicus (1473-1543) - it was assumed that space and time were fundamentally different things and that both were absolute, set in marble. HtNCE, FOR. NEWTON-ANO FOP.. THOSE WHO FOLlfJW£t>HIMSPACE ANO TIME. WEP.£ TH~ A8$0LU7£ ANP IMM.UTABlt. STJ\GE5 ON WHICH MAITE/Z. IN THe UNtVER5E fr..AYE.f> our /1$ CAkiE.$ The idea of unifying the two, apparently different, concepts of space and time fell to Einstein, as we'll later discuss. 7

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The Law of Gravity

Newton's law of universal gravitation states that the force of gravity (F) between two objects of masses m and M is given by ...

F GmM r2 where ris the distance between the two objects and G is Newton's constant. G is very small since gravity is very weak. There are at least two implications to this law of gravity ...

THE FIR5T /$A M4THEMATICAL J)f()[JCT/ON OF KtPUr<.'> LAW;; OF PlAN£TAR.Y M077oN -

\

\

GRAVITY SUPPLI$ TH£ MISSING

THEORE.TICAL

~ -- -- -----~~~

\

\

\

\

.5ECONI>, MY l.A.W GIV£5 THE. /

ELLIPSE$ /

111AN ON CIP...C.U.$

6

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