If g on the surface of the earth is 10m/s it's value at height of 6400 km is (radius of the earth is 6400)
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g means acceleration due to gravity
therefore, g=GM/R^2
but here height is given
H=6400km
H=6400000m
therefore,g=GM/(R+H)^2
g=6.67*10^-11*6*10^12/
(6400000+6400000)^2
g=6.67*6*10^13/12800000^2
by solving above equation , weget,
g=2.45m/s^2
therefore, g=GM/R^2
but here height is given
H=6400km
H=6400000m
therefore,g=GM/(R+H)^2
g=6.67*10^-11*6*10^12/
(6400000+6400000)^2
g=6.67*6*10^13/12800000^2
by solving above equation , weget,
g=2.45m/s^2
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