Physics is about how things move and change, yet it is often taught with static diagrams and equations on a page. Interactive simulations close that gap. When students can drag a planet, change a mass or tweak a wave and instantly see what happens, abstract ideas become intuitive.
What makes a good simulation?
- Direct manipulation – sliders, drag-and-drop objects and play/pause controls.
- Immediate feedback – changes show up in real time.
- Multiple representations – an animation, a graph and the underlying numbers side by side.
- Room to explore – students can ask “what if?” without breaking anything.
Classic examples
Orbits and gravity
An orbit simulator lets learners launch a satellite at different speeds and watch it fall back to Earth, circle it or escape. Kepler’s laws stop being formulas and become something you can see.
Waves and quantum mechanics
Visualising a wave packet moving through a potential well, as described by the Schrödinger equation, makes an otherwise mathematical topic far more approachable.
Algorithms as physics
Animated sorting algorithms, where values “ripple” into order, show how simple local rules create global structure – the same principle behind many physical and biological systems.
Growth and emergence
Simple rule-based models, such as cellular automata or growing plant structures, show how complex patterns emerge from simple beginnings.
Learning by building
The next step is letting students write their own simulations. Creating even a basic bouncing-ball model teaches programming, numerical methods and physics at the same time. University courses on computational design have used this approach for decades, and free tools such as PhET simulations, p5.js and Python notebooks make it accessible to anyone today.
Tips for teachers and self-learners
- Start with a question, not the tool.
- Ask learners to predict the outcome before pressing play.
- Compare the simulation with a real experiment when possible.
- Discuss the model’s limitations – every simulation simplifies reality.
Explore more learning resources in our Education section, or read about the language quirk known as the snowclone.
