Q 11-07-083JEE MainJEE Main 2023 (31 Jan, Shift 2)Easy
A body of weight $W$ is projected vertically upwards from earth's surface to reach a height above the earth which is equal to nine times the radius of earth. The weight of the body at that height will be
Answer: (B) $\dfrac W{100}$
At height $9R$ the distance from the centre is $10R$, so $W'=\dfrac{W}{10^2}=\dfrac{W}{100}$.
Solution by Sreeraj P, M.Sc Physics