The value of acceleration due | Gravitation | JEE MAIN 2019

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JEE MAIN_2019_

S2_100419

Question

The value of acceleration due to gravity at Earth's surface is $9.8 \mathrm{~ms}^{-2}$. The altitude above its surface at which the acceleration due to gravity decreases to $4.9 \mathrm{~ms}^{-2}$, is close to: (Radius of earth $=6.4 \times 10^6 \mathrm{~m}$ )

Select the correct option:

A

$9.0 \times 10^6 \mathrm{~m}$

B

$6.4 \times 10^6 \mathrm{~m}$

C

$1.6 \times 10^6 \mathrm{~m}$

D

$2.6 \times 10^6 \mathrm{~m}$

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