At what height is the value of g half that on surface of earth
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Near Earth's surface, gravitational acceleration is approximately 9.8 m/s2, which means that, ignoring the effects of air resistance, the speed of an object falling freely will increase by about 9.8 metres per second every second.
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g at a height is given by the formula g(R/R+h)^2
g/2=g(R/R+h)^2
Taking sq.rt and solving, h=0.414R where R is taken as 6400km.
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