Physics - Gravitation Question with Solution | TestHub

Value of acceleration due to gravity decreases on going below the surface of the earth. Weight $(w)$ of a body is defined as product of mass $(m)$ and acceleration due to gravity $w=mg$. The value of g below the surface of earth at a distance $h$ is given by, $\begin{array}{rl}& g^{\prime }=g\left(1-\frac{h}{R}\right)\\ & \Rightarrow W^{\prime }=W\left(1-\frac{h}{R}\right)\end{array}$ Given, $W^{\prime }=250\mathrm{N}$ and $W=500$ $\begin{array}{rl}& 250=500\left(1-\frac{h}{R}\right)\\ & \Rightarrow h=\frac{R}{2}=32000\mathrm{km}\end{array}$