Hi all, first year MechEng student here, final question of the final assignment of the year, would appreciate any assistance: 1. The problem statement, all variables and given/known data A 0.150 kg yo-yo has an outer radius R that is 5.60 times greater than the radius r of its axle. The yo-yo is in equilibrium if a mass m is suspended from its outer edge, as shown in the figure . (http://session.masteringphysics.com/problemAsset/1123236/2/Walker.11.95.jpg) Find the tension T1 Find the tension T2 Find the mass 'm' 2. Relevant equations w=mg I=1/2mr2 3. The attempt at a solution Having drawn FBD's for the system, I found no problem in deriving an equation for T1 (if I find this I'm sure I will have no problem with the rest) however it contained variables which when submitted, I was told the answer was not to contain. After much struggling I can't see how it can be done.