The brachistochrone problem

Find out whether the marble reaches the finish line faster on the straight or on the curved slope.

Related extras

String saw

In this experiment we prove that it is possible to cut a bottle with just a string.


The animation shows the way forces act on wheeled vehicles and vehicles with runners.

Physicists who changed the world

These great scientists had a tremendous impact on the advancement in physics.


A spacecraft on its path is in a constant state of free fall.

Re-lighting a candle

Can a candle be re-lit if the flame of the match does not even touch it?

The development of celestial mechanics

This animation introduces the studies of astronomers and physicists whose works...

Beverage machine - Part 1

Is it possible to turn pure water into a soft drink in a few seconds?

Frog violin

Is a matchbox able to imitate the croak of frogs? With the following experiment we reveal the...

Added to your cart.