7.Gravitation
medium

A body weight $500 \,N$ on the surface of the earth. How much would it weigh half way below the surface of the earth ....... $N$

A

$125$

B

$250$

C

$500$

D

$1000$

Solution

(b) Weight on surface of earth, $mg = 500\,N$ and weight below the surface of earth at $d = \frac{R}{2}$ 

$mg' = mg\left( {1 – \frac{d}{R}} \right) = mg\left( {1 – \frac{1}{2}} \right) = \frac{{mg}}{2} = 250\,N$

Standard 11
Physics

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