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10 cards from this deck
1684
Moon constantly falling towards Earth but never reaches surface
Force ∝1(distance)2\propto \frac{1}{(\text{distance})^2}∝(distance)21
Directly proportional to product of masses
F=Gm1m2r2F = \frac{Gm_1m_2}{r^2}F=r2Gm1m2
6.67×10−116.67 \times 10^{-11}6.67×10−11 N m2^22 kg−2^{-2}−2
Henry Cavendish
Spherical objects with mass acting as if concentrated at centre
Reduces force to one quarter
1687
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