Newton's Pendulum Cradle - Steel Ball Conservation of Momentum Desk Toy
The most iconic physics demonstration ever made. The Newton's Pendulum Cradle demonstrates conservation of momentum and energy through the endless click-clack of steel balls — a hypnotic, meditative desk toy that never stops being fascinating.
Lift one ball, release it, and watch it transfer its momentum through the chain of stationary balls, launching the last one upward with identical velocity. Lift two, and two launch. The physics is precise, elegant, and endlessly repeatable.
The Physics
Newton's Cradle is a simultaneous demonstration of conservation of momentum (p = mv) and conservation of kinetic energy (KE = ½mv²). In a perfectly elastic collision, both are conserved simultaneously — the only mathematically allowed solution is that the same number of balls that enter must exit at the other end with the same speed.
Specifications
- High-polish stainless steel balls
- Chrome-plated steel frame
- Weighted base for stability
- Nylon suspension strings for frictionless swing
- Suitable for desk, shelf, or classroom display
Fulfilled via CJ Dropshipping. Ships worldwide in 7-20 business days.