1. The problem statement, all variables and given/known data A child exerts a tangential 41.6 N force on the rim of a disk-shaped merry-go-round with a radius of 2.40 m. If the merry-go-round starts at rest and acquires an angular speed of 0.0850 rev/s in 3.50 s, what is its mass? 2. Relevant equations torque = r * F (I + mr^2) ω / t = torque I of a solid disk = 1/2 mr^2 3. The attempt at a solution I found the tangential torque to be 99.84 N/m, and set the momentum equation to it, plugging in the moment of inertia. I got 713.7, and the answer is 227 kg. What am I doing wrong?