Question

Value of acceleration due to gravity of earth is maximum :

• A. At centre of earth
• B. At surface of earth
• C. At a height of 50 km from earths surface
• D. At a height of 12 km from earths surface

Answer 1

Answer: (B)

At surface of earth

Acceleration due to gravity at a height $h$ above the surface $g^{\prime }=g(1-\frac{2h}{R})$

This suggest that acceleration due to gravity decreases as we go up higher above the earth surface.

At the surface, we have $h=0$

Thus acceleration due to gravity at the surface $g^{\prime }=g$ (maximum).

Also acceleration due to gravity is zero at the centre of earth.

Thus acceleration due to gravity is maximum at the earth's surface.