The Legend
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A yo-yo is made of two solid cylindrical disks, each of mass 0.047 kg, and diameter 0.09 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0047 kg, and diameter 0.0105 m.
(a) Use conservation of energy to calculate the linear speed of the yo-yo just before it reaches the end of its 0.89-m long string, if it is released from rest.
______m/s
(b) What fraction of its kinetic energy is rotational?
___%
(a) Use conservation of energy to calculate the linear speed of the yo-yo just before it reaches the end of its 0.89-m long string, if it is released from rest.
______m/s
(b) What fraction of its kinetic energy is rotational?
___%