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A pulley wheel 8.14 cm in diameter has a 5.63-m-long cord wrapped around its periphery. Starting from rest, the wheel is given an angular

 

A pulley wheel 8.14 cm in diameter has a 5.63-m-long cord wrapped around its periphery. Starting from rest, the wheel is given an angular acceleration of 1.47 rad/s. (a) Through what angle must the wheel turn for the cord to unwind? (b) How long does it take?

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