Newton’s cradle
Newton’s cradle, named after Sir Isaac Newton, is a device that demonstrates conservation of momentum and energy via a series of swinging spheres. When one on the end is lifted and released, the resulting force travels through the line and pushes the last one upward. The device is also known as an executive ball clicker, Newton’s balls, Newton’s pendulum, or Newtonian Demonstrator.
this thing if you have it in your home is addictive !!
Iskolán kívül imádom