Physics · 2021
JEE Main · 3 August 2021, Shift 1 · Q6
As shown in the figure, a string of length ' l ' holds a small bob of mass ' m ' while suspended from a point ' O '. The bob revolves about a…
As shown in the figure, a string of length ' $\displaystyle l$ ' holds a small bob of mass ' $\displaystyle m$ ' while suspended from a point ' O '. The bob revolves about a vertical line OC passing through the point of suspension on a horizontal circle such that the string always remains inclined to the vertical at an angle ' $\displaystyle \alpha$ '. The angular frequency of revolution will be -
Official answer
(1)
$\displaystyle \sqrt{\frac{g}{l \cos \alpha}}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.