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A siring is wrapped several times around the rim of a small hoop with radius 8.00 cm and mass 0.180 kg. The free end of the string is held in place and the hoop is released from rest (Fig. E 10.20). After the hoop has descended 75.0 cm. calculate (a) the angular speed of the rotating hoop and (b) the speed of its center.
Figure E10.20
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