Question:

The gravitational potential at a point above the surface of earth is 5.12 x 10^7 / J kg and the acceleration due to gravity at that point is 6.4 m/s².Assume that the mean radius of earth to be 6400 km. The height of this point above the earth’s surface is :

(1) 1600 km 

(2) 540 km

(3) 1200 km 

(4) 1000 km

                                        JEE-2024

Solution:                
The gravitational potential at a point above the surface of earth is 5.12 x 10^7 / J kg and the acceleration due to gravity at that point is 6.4 m/s².Assume that the mean radius of earth to be 6400 km. The height of this point above the earth’s surface is : (1) 1600 km (2) 540 km (3) 1200 km (4) 1000 km JEE-2024

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