Physics · 2021
JEE Main · 26 February 2021, Shift 1 · Q8
Assume that a tunnel is dug along a chord of the earth, at a perpendicular distance (R/2) from the earth's centre, where ' R ' is the radius of the…
Assume that a tunnel is dug along a chord of the earth, at a perpendicular distance (R/$\displaystyle 2$) from the earth's centre, where ' $\displaystyle R$ ' is the radius of the Earth. The wall of the tunnel is frictionless. If a particle is released in this tunnel, it will execute a simple harmonic motion with a time period :
Official answer
(2)
$\displaystyle 2 \pi \sqrt{\frac{R}{g}}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.