A solid cylinder is suspended symmetrically through two massless strings wound on it (a yo-yo). The distance it should descend to unwind the strings and reach a speed of 4 m/s is cm. (take g=10 m/s²)

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120. Unwinding cylinder: a=g/(1+I/(mR²))=g/(1+1/2)=(2g)/3=(20)/3 m/s². v²=2a d⇒ 16=2·(20)/3d⇒ d=1.2 m=120 cm.

A solid cylinder is suspended symmetrically through two massless strings wound on it (a yo-yo). The distance it should descend to unwind the strings and reach a speed of 4 m/s is ______ cm. (take g=10 m/s²)

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