1. The problem statement, all variables and given/known data A person of mass 71 kg stands at the center of a rotating merry-go-round platform of radius 3.2 m and moment of inertia 920 kg * m^2 . The platform rotates without friction with angular /velocity 1.7 rad./s. The person walks radially to the edge of the platform. 2. Relevant equations ω^2 * r = α 3. The attempt at a solution The first question I asked myself was, "How long did it take him to walk to the edge of the platform?" I found α to be ≈ 29.59 rad./s but I'm having trouble finding an equation relating this to time. I don't know θ and don't know ω final. Is there another way I should be looking at this?