We know that everything that goes up comes down due to gravity . But have you seen Moon crashing into the Earth or Earth crashing into the Sun while revolving ? Ofcourse not . The answer lies in the fact that they move side ways relative to the Earth's and Sun's surface . To solve this , The Great Scientist "Issac Newton" studied the previous works of Kepler and Galileo and came up with a law for gravitation . The Law states that :- 1) Every particle of matter attracts every other particle of matter . 2) Force of attraction is proportional to the product of masses of the particles which means heavier the bodies more the force of attraction between them . 3) If distance between the particles is doubled , the force decreases by 4 times . Therefore , we get F ∝M.m/r 2 In order to turn proportionality into equation we have to replace the 'proportionality symbol' with an 'equal to' symbol and that means we have to add a constant wh
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