Newton Cradle Balls

Newton Cradle Balls

1) Newton's Cradle is a classic desk toy
2) Also known as balance balls
the clacking of the balls will keep you entertained throughout the day
3) Pull back one or more of the balls,release them and the same number of balls will swing up on the opposite side
4) The balls will click back and forth until they stop.
5) Metal frame, wood base
6) Please note, the balls do not swing indefinitely and eventually stop.
7) 20mm diameter steel balls.
8) Size: 180x150x184mm
9) This is the famous law of conservation of momentum

ราคา 400 บาท

http://www.youtube.com/watch?v=jid7Nlzfet8

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