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Physics · PYQ NEET UG 2017
हिन्दीThe acceleration due to gravity at a height \( 1\text{ km} \) above the earth is the same as at a depth d below the surface of earth. Then:
Correct answer · Option 4
\( d = 2\text{ km} \)
Explanation
For small height \( h \) and depth \( d \), \( g_h = g(1 - \frac{2h}{R}) \) and \( g_d = g(1 - \frac{d}{R}) \). Equating \( g_h = g_d \) gives \( d = 2h = 2(1\text{ km}) = 2\text{ km} \).
