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JEE MAIN 2020
08-01-20 S1
Question
A particle of mass m is fixed to one end of a light spring having force constant k and unstretched length l. The other end is fixed. The system is given an angular speed  about the fixed end of the spring such that it rotates in a circle in gravity free space. Then the stretch in the spring is
Select the correct option:
A
$\frac{\mathrm{m} \mid \omega^2}{\mathrm{k}-\omega \mathrm{m}}$
B
$\frac{\mathrm{m} \mid \omega^2}{\mathrm{k}+\omega \mathrm{m}^2}$
C
$\frac{m \mid \omega^2}{k+m \omega}$
D
$\frac{m \mid \omega^2}{k-m \omega^2}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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