If a body of mass from infinity |Gravitation | JEE MAIN_2026

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JEE MAIN_2026

02-04-26_S2

Question

If a body of mass 1 kg falls on the earth from infinity, it attains velocity $(v)$ and kinetic energy $(k)$ on reaching the surface of earth. The values of $v$ and $k$ respectively are $\_\_\_\_$ . (Take radius of earth to be 6400 km and $g=9.8 \mathrm{~m} / \mathrm{s}^2$ )

Select the correct option:

A

$11.2 \mathrm{~km} / \mathrm{s} ; 6.27 \times 10^7 \mathrm{~J}$

B

$11.2 \mathrm{~km} / \mathrm{s} ; 12.54 \times 10^7 \mathrm{~J}$

C

$8.8 \mathrm{~km} / \mathrm{s} ; 6.27 \times 10^7 \mathrm{~J}$

D

$8.8 \mathrm{~km} / \mathrm{s} ; 12.54 \times 10^7 \mathrm{~J}$

✓ Correct! Well done.

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