A smooth disc of mass M and radius R can rotate freely around a vertical axis su | TestHub

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A smooth disc of mass M and radius R can rotate freely around a vertical axis supported by frictionless bearings. A constraining vertical surface of negligible mass, whose shape is a semicircular arc of radius r = $R /2$ is fixed on the disc as shown in the figure. A small ball of mass m is placed on the stationary disc and is bowled at a speed v in such a way that it reaches the internal side of the constraining surface tangentially.Mark the correct statement :

Options:

Answer:

C

Solution:

Let the ball leave with velocity $u$ and the disc rotate with $ω$ in a clockwise direction.

Angular momentum is conserved about the center of the disc: $L_{i} = L_{f}$

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Angular momentum

⏱ 2mℹ️ Source: QB

Physics - Rotation Question with Solution | TestHub

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