The gravitational potential at height h above the earth's surface is – 5.12 × 10 7 J/kg and acceleration due to gravity at this point is 6.4 m s 2 . If radius of the earth is 6400 km, the value of h is:
Text Solution
Verified by ExpertsThe correct answer is:
B
Gravitational potential
v = – 
; g ' = 
Now, v = – 
(R + h) = – g ' (R + h)
∴ – 5.12 × 10 7 = – 6.4 (6400 + h) × 10 3
h = 1600 km.
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