26

Charity bin

Roll a coin in along the rim and it spirals down, faster every lap, until it drops.

Built on Kinetic's gravity well
Raised£0.00
In play0
Dropped0
No coins rolling

    Drag on the funnel to flick a coin in. Tap the funnel to drop one there. Drag off the funnel to orbit.

    z = −A / √(r² + ε²)