Physics · 2021
JEE Main · 22 July 2021, Shift 2 · Q12
A body is projected vertically upwards from the surface of earth with a velocity sufficient enough to carry it to infinity. The time taken by it to…
A body is projected vertically upwards from the surface of earth with a velocity sufficient enough to carry it to infinity. The time taken by it to reach height $\displaystyle h$ is \_\_\_\_ s.
Official answer
(2)
$\displaystyle \frac{1}{3} \sqrt{\frac{2 \mathrm{R}_{\mathrm{e}}}{\mathrm{~g}}}\left[\left(1+\frac{\mathrm{h}}{\mathrm{R}_{\mathrm{e}}}\right)^{3 / 2}-1\right]$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.