Hi, I was recently thinking about a problem which I have no idea how to solve. A full water container with volume V is hanged on a rope with length L (mass of the rope is negligible). It then starts to revolute around the point where the rope is hooked (circular motion, circle with radius L) with angular velocity ω. Express the water density ρ as a function of V, L, and ω. Thanks in advance for any help.