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Electronics/Acceleration due to gravity.


Dear ZZ

The value of Acceleration due to gravity is taken as 9.8 m/s square.   How this value is derived and computed and why this number is not any other number viz 6, 8, 12, 15 etc ?.   

Thanks & Regards,
Prashant S Akerkar

This URL gives a good overview of acceleration due to gravity:

Earliest experimenters merely dropped an object from a known distance and timed its arrival.

The reason it is 9.8 meters/sec/sec is because of the law of gravity for the earth.  The value of gravitational acceleration on the moon or Mars would be different due to the mass of those celestial objects.

Gravitational pull at the surface of the moon, for example, is only 17% that of the earth.

Hope this helps.  


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