1. The problem statement, all variables and given/known data A yoyo is made of two solid cylindrical disks each of mass .050kg and diameter .075m joined by a concentric thin solid cylindrical hub of mass .0050kg and diameter .010m. use conservation of energy to calculate the linear speed of the yoyo when it reaches the end of its 1 m long string, if it is released at rest. b. What fraction of it's rotational energy is rotational? 2. Relevant equations I=1/2 MR^2 Vt=r*omega KErot= 1/2 I W^2 KEtrans=1/2MV^2 Wnc= deltaKE + deltaPE 3. The attempt at a solution I have calculated the moment of intertia for the disks and hub and have aded them together. I'm not sure where exactly to go from here, so I would love to know where to go next. Would I use the hub radius and 2pi radians to determine the angular velocity? Do I use potential energy from the work equation? Please point me in the right direction!