define acceleration due to gravity. derive an expression for acceleration due to gravity in terms of mass of the earth (m) and universal gravitational constant (g)
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Acceleration due to gravity:
The acceleration of a body in free fall under the influence of earth's gravity expressed as the rate of increase of velocity per unit of time and assigned the standard value of 980.665 centimeters per second per second.
Mass of the earth = 6.0 x 1024 kg; mean radius of the earth = 6.4 x 106 m; G =6.67 x 10-11 N m2 kg-2. Acceleration due to gravity at the surface of the earth = 9.8 m/s2.
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