A particle is tied to 20, cm long string. It performs circular motion in vertical plane. angular vel

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5.Work, Energy, Power and Collision

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A particle is tied to $20\, cm$ long string. It performs circular motion in vertical plane. What is the angular velocity of string when the tension in the string at the top is zero ........ $rad/sec$

A$5$

B$2$

C$7.5$

D$7$

Solution

$\omega = \sqrt {\frac{g}{r}} = \sqrt {\frac{{9.8}}{{0.2}}} = 7\,rad/\sec $

Standard 11

Physics

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