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7) A rope is wound several times around the edge of a small hoop with a radius of 8 cm and a
mass of 0.18 kg. Keeping the free end of the rope as shown in the figure, the hoop is released.
After the hoop descend 75 cm, (a) find the angular velocity of the rotating hoop, (b) find the
velocity of the center of mass.
0.0800 m

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