Hello, I'm new and quite unfamiliar with all the conventions, but I'll use underline for vectors since I couldn't find the proper thing (is the convention to use bold here?) Problem: No more. Relevant equations: Fnet = ma = 0 τnet = Iα = 0 τ = r x F = rFsinθ Fbuoyancy = ρwaterVg Attempt at solving: What I realised is that since the plank isn't in translational nor rotational motion, the net force and torque are both zero. T = tension, G = gravitational f., B = buoyancy. T + G + B = 0 in scalar: T + G - B = 0 Also, I know how to equate the torques (only gravity and buoyancy cause torque), but I can't find out the distances nor angles. I can also express the gravitational force in terms of density of the plank and it's volume...? Things just don't cancel out neatly there. I can provide a diagram if really necessary, but I'd prefer not to now, I have very limited time. Thanks in advance. Also, is the template there to be followed rigorously or is any kind of organised posting viable?