🚜 Tractor and Trailer on a Muddy Slope: Friction Limit and Climb (2D side view)

Side view of a tractor with a loaded trailer climbing a muddy lane. Change friction, slope, load, motor power and throttle and see drive force, grip limit and slope pull, and the steepest grade the truck can climb. Same physics file as the 3D page, with four in-page numerical checks.