A bob is whirled in a horizontal plane by means of a string with an initial speed of omega mathrm{rp

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3-2.Motion in Plane

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A bob is whirled in a horizontal plane by means of a string with an initial speed of $\omega \mathrm{rpm}$. The tension in the string is $T$. If speed becomes $2 \omega$ while keeping the same radius, the tension in the string becomes:

A$4 T$

B$\frac{T}{4}$

C$\sqrt{2} T$

D$T$

(NEET-2024)

Solution

(image)
$T=m / \omega^2$
(image)
$T^{\prime}=m \ell(2 \omega)^2$
$T^{\prime}=4$

Standard 11

Physics

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