JEE Main 2017 — Gravitation Question with Solution

When d < R means distance of a point is d from the center of the circle where d is inside the earth surface. In this case the value of acceleration, $$g=-\frac{GMd}{R^3}$$

$$\therefore$$ $$g\propto d$$

So inside of the earth surface g - d graph is straight line.

When d > R means distance of a point is d from the center of the circle where d is outside of the earth's surface. In this case the value of acceleration, $$g=-\frac{GM}{d^2}$$

$$\therefore$$ $$g\propto \frac{1}{d^2}$$

So outside of the earth surface g - d graph is hyperbolic.