A ball rolls slowly across a table and bumps into a still one. Watch what happens to the motion at the moment they touch.
The motion is passed on
The motion isn't lost in the hit — it's handed over. With equal weights the first ball stops dead and the second rolls off with all the speed, like a Newton's cradle.
Three worlds
Equal — same weight, a clean hand-off. Heavy vs light — a heavy ball barely slows; a light one gets flung fast. Sticky — they clump and move on together.
Reach the pocket
In the game, a pocket waits down the table. Set the speed and the weights so the second ball rolls right into it.
Play, then learn why
The balls settle and sit a moment — nothing slaps you. When you want to know why the motion moved like that, tap 🔬. The science comes only when you ask.