Newtons Cradle is named after Sir Isaac Newton himself, an invention which he employed to demonstrate a scientific discovery. Pull up 1 ball of the Newtons Cradle, release it, and on impact, only 1 ball moves from that reaction. Pull up 2 balls of the Newtons Cradle, release them and then 2 balls will react! The simple yet unexpected result from the Newtons Cradle shows that every action has an equal and opposite reaction.
Newtons Cradle Balance Balls,Relieve Stress Desk Educational Decoration Z-shaped Newton PendulumNote:The ball swings about 50 times (about 15-20 seconds) with every hit due to frictional resistance,air resistance and other factorsFeatures:Size:18cm*11cm*19cmWeight:about 500g.Material:Metal base, Metal holder, Nylon threadHigh qualiy of decoration items.