Seesaw

Physics

Air resistance 0.010

Velocity damping on every body; 0 is a vacuum.

Friction 0.60

Surface friction where bodies touch; 0 is ice.

Plank density 1.00e-3

Mass of the seesaw: 5.60 kg over its 400 × 14 px face. Raise it and the plank resists being spun by whatever lands on it. The floor is not 0: a zero-mass body gives Matter a 1/0 inverse mass and the solver goes NaN, so the slider stops at 0.56 kg.

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