Physics by grade
The units of Kerncurriculum (Lower Saxony, Gymnasium) with matching simulations. The summaries are our own – the original text is authoritative.
More simulations
These simulations are not assigned to a grade in the Lower Saxony curriculum.

Law of the lever
How can a child lift an adult on a seesaw? With the longer arm. Wheelbarrows and bottle openers use the same trick.

Inclined plane
A block sits on a slope. At what angle does it start to slide? The weight is split into two parts to find out.

Elastic and inelastic collisions
Two gliders collide on an air track. Before and after are compared to see what stays the same.

Planetary orbits and Kepler’s laws
Too fast and the planet flies off, never to return. A little slower and it traces an ellipse around the Sun, exactly as Kepler's laws say.

Doppler effect
An ambulance drives past and the siren sounds lower. The wave fronts show why. You can also listen to it.
The summaries describe the curriculum in our own words. The original text is authoritative.