🪣 Zhuravel Well Sweep: Lever Torque, Counterweight Tuning and Draw-Cycle Effort Lab - 2D Free-Body Diagram and Effort Curve

2D companion of the Zhuravel well sweep lab: a free-body diagram of the pole with weights and operator force, the effort over one draw cycle, and the V-shaped peak effort against counterweight. Uses the same lever module as the 3D version.