Question

find the value of g at a height of 400km above the surface of the earth R=6400,g=9.8m/s​

Answer 1

Answer:-

Find the value of g at a height of 400 km above the surface of the earth . Given radius of the earth , R = 6400 km and value of g at the surface of the earth = 9.8ms –²

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Answer 2

M = 6×10^24kg

R =6400 km

= 6400×1000 =6.4×10^6 m

h = 400 km

= 400×1000 m

= 4×10^5 m

g=GM/(R+h)^2

= (6.67×10^-11 × 6×10^24)/ (6.4×10^6+4×10^5)

= (40.02×10^13)/(6.4+0.4)×10^6

= (40.02/6.8)×10^7

= 5.88×10^7 N.