A rope has a max tension of 800N. A swinger is pulled back so that the rope is 27 degrees from vertical. What's the max mass of the swinger? Ok... I have tried a few approaches. I can't relate potential to kinetic because I am not given height. And even if i could get to kinetic, i don't know mass! I figure that tension must be able to support weight and apply the centripetal force, T=mg + mv^2/r But I have no r.. no length, no v.. what's the key?