Question

A body weighs $250\text{N}$ on the surface of the earth. How much it weighs half way down to the centre of the earth ?

• A. $250\text{N}$
• B. $125\text{N}$
• C. $111\text{N}$
• D. $75\text{N}$

Answer 1

The correct option is B $125\text{N}$

We know that, the weight of an object at a depth from the surface of the Earth is given by,

$W^{\prime }=W_0(1-\frac{d}{R})$

i.e. $W^{\prime }=W_0(1-\frac{1}{2})=\frac{W_0}{2}$

$=125\text{N}$