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Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionMiscellaneousMedium2 minPYQ_2019

PhysicsMediumsingle choice

A block of mass $10 k g$ is in contact against the inner wall of a hollow cylindrical drum of radius $1 m$ . The coefficient of friction between the block and the inner wall of the cylinder is $0.1$ . The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis will be $(g = 10 m s^{- 2})$ ,NEET 2019 (All India)

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Answer:

Solution:

$N = m ω^{2} R$
$f = m g$
For minimum angular velocity,
$f = μ N$
$m g = μ \cdot m ω^{2} R$
$ω = \sqrt{\frac{g}{μ R}} = \sqrt{\frac{10}{0.1 \times 1}} = 10 r a d s^{- 1}$

Stream:NEETSubject:PhysicsTopic:Circular MotionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2019

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