1. The problem statement, all variables and given/known data 2. Relevant equations radial acceleration = v^2/R 3. The attempt at a solution I'm unsure if we have to mention the tension of the cable, but I'm guessing L2 will suffice? Correct me if I am wrong. Anyways, I drew the diagram from a side view (kind of like a circular pendulum) but L1 and the angle is throwing me off. I also drew a free body diagram of the seat at the 3 o'clock position: Tcable (tension or L2?) point towards the center, Tz pointing north, Tr pointing left, and Fg downwards. In the z direction, I have Tz + Fg = 0, so Tcable = mg/cos(theta). In the radial direction, I have Tr = ma(radial) > Tsin(theta) = mv^2/L1(?) so far. Help will be greatly appreciated.