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Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A stone is tied to one end of a string and is rotated in a horizontal circle with a uniform angular velocity. Let $T$ be the tension in the string. If the length of the string is halved and the angular velocity of the stone is doubled, the tension in the string will be

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Answer:

Solution:

Tension in the string
Initial $T_{1} = m (ω^{2}) r$

Finally $T_{2} = m (\frac{r}{2}) \cdot {(2 ω)}^{2}$

$= 2 mr ω^{2}$

$\frac{T_{2}}{T_{1}} = 2$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Circular MotionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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