Q. There is a mine of depth about 2.0 km. In this mine the conditions as compared to those at the surface are
A) Lower air pressure, higher acceleration due to gravity
B) Higher air pressure, lower acceleration due to gravity
C) Higher air pressure, higher acceleration due to gravity
D) Lower air pressure, lower acceleration due to gravity
Explanation
(b) Below the sea level the pressure is increasing with depth in mine due to presence of atmospheric air there. The acceleration due to gravity below the surface of the earth decreases with the distance from the surface of the earth
as $g^{'} = g\left( 1 - \frac{d}{R} \right)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.