define acceleration due to gravity. on what factors does it depends? name the places where its value is zero.
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When an object falls freely towards the surface of the earth from a certain height, then its velocity changes. This change in velocity produces acceleration in the object which is known as acceleration due to gravity denoted by the letter g. The value of acceleration due to gravity g= 9.8 m/s2.
Acceleration due to gravity depends on mass of earth, gravitational constant and distance between centre of earth and object.
when the body is at the center there is no need to pull it towards the center anymore. So, acceleration due to gravity is zero at the center of the Earth.
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