Iveria

throw it. watch what the air does.

throw a ball, stick, stone or beach ball into the sea and watch air slow each one differently

Without air every throw flies the same parabola. With it, each thing slows by its own terminal speed: the ball flies almost the whole arc, the beach ball stops dead and blows back, and a stone skips only when thrown low. Real drag; the skip rule is simplified.

Concepts: trajectory, gravity, drag.

An interactive you play with one thumb, on Wundr.