Therefore, for practical purposes we take acceleration due to gravity as a constant. As the apocryphal story goes, Sir Isaac Newton sat beneath an apple tree, when an apple fell onto his head and inspired his work on the theory of gravitation. Also that value of #g# varies insignificantly if distance between the body and the surface of earth is very small as compared to average radius of the earth. g 9. This gives us average value of #g# as #9.81\ ms^-2# on the surface of earth. The magnitude of the acceleration due to gravity, denoted with a lower case g, is 9.8 m/s 2. The legend is that Newton discovered Gravity when he. We also know that average radius of earth is #6,371\ km#. Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. We get acceleration due to gravity, which is also called gravity, asįrom above we see that when the body is located on the surface of the earth gravity isĪs earth is not a perfect sphere, value of gravity #g# is not a constant at all the locations on the surface of the earth. The acceleration due to gravity that our smaller mass experiences is actually independent of that mass's value. In case one of the body is the earth of mass #M_e# and other body has mass #m# we haveĬomparing modulii with the equation for Newton's Second Law of Motion Acceleration due to gravity is the increased speed of an object as it approaches the ground under the influence of gravity. it is also inversely proportional to the square of the distance #r# between the two. As per Law of Universal Gravitation the force of attraction #F_G# between two bodies of masses is directly proportional to the product of masses of the two bodies.
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