At what height from the surface of earth the gravitation potential and the value of g are \[\,\,5.4\times {{10}^{7}}\text{ }J\text{ }k{{g}^{2}}\] and \[6.0\text{ }m{{s}^{-2}}\] respectively? |
Take the radius of earth as 6400 km: [NEET - 2016] |
A) 2600 km
B) 1600 km
C) 1400 km
D) 2000 km
Correct Answer: A
Solution :
[a] (1) |
And (2) |
dividing (1) and (2) |
so |
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