Question

Assuming the earth to be sphere of uniform density, the acceleration due to gravity-

• A. At a point outside the earth is inversely proportional to the square of its distance from the centre
• B. At a point outside the earth is inversely proportional to its distance from the centre
• C. At a point inside is zero
• D. At a point inside is proportional to its distance from the surface

Answer 1

The correct option is A

At a point outside the earth is inversely proportional to the square of its distance from the centre

Outside earth, g=$\frac{GM}{r^2}$, Inside earth, g=$\frac{GM}{R^3}$r