Slope Run 3D: Crate or Roller on a Tilting Ramp with Friction, Drag and Braking

The ramp is tilted by the slope angle and the track length is mapped to the 12-unit board, with a tick every 10 percent. A crate slides when rolling inertia is zero; a roller (a wheel with spokes) appears and rolls without slipping when it is greater than zero. The block size follows the cube root of the mass and the teal arrow is proportional to the current speed.

All numbers come from the same physics.mjs solver as the 2D companion, including the closed-form and energy-balance checks below, so both pages agree. Drag to orbit, scroll or pinch to zoom.