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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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A small object of mass m is attached to a light string which passes through a hollow tube. The tube is hold by one hand and the string by the other. The object is set into rotation in a circle of radius R and velocity v. The string is then pulled down, shortening the radius of path of

r

. What is conserved

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Correct option: A

Angular momentum

Option A (Angular momentum) is correct because there is no external torque acting on the object, so its angular momentum is conserved.

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