A string wrapped around a solid cylinder of mass M and radius R. The string is pulled vertically upward to prevent the centre of mass of the cylinder from falling as the cylinder unwinds the string. Choose the correct options: (A). the tension in the string is 2Mg (B). the length of the string unwound until its angular velocity becomes w is w^2R^2/2g (C).the angular acceleration of the cylinder is 2g/3R (D).work done by tension on the cylinder until its angular velocity becomes w is 1/4Mw^2R^2
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