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A yo-yo is made of two solid cylindrical disks, each of mass 0.052 kg and diameter 0.070 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0053 kg and diameter 0.010 m.
A.) Use conservation of energy to calculate the linear speed of the yo-yo when it reaches the end of its 1.0\({\rm m}\) long string, if it is released from rest.
V = ?
B.) What fraction of its kinetic energy is rotational?
KErotational / KEtotal = % ?
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