Restitution · e = v↑ / v↓
unseel.com · bounciness · elastic vs inelastic · h′/h = e²
Rebound e
Height h′/h
stage
Superball · e ≈ 0.90
Basketball · e ≈ 0.76
Clay · e ≈ 0.05
Rebound height marker
Unseel.com · Coefficient of Restitution