Newton’s cradle is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward.
The marbles hurtling down curved inclined channels demonstrate these conservation principles, too.
Find out which reaches faster – a marble down the straight inclined channel or the one down the curved channel.
Also, why the roller in double conical shape apparently defies gravity and rolls up the inclined rods.
All of us know that we need a pump to take water...