A physical simulation is only convincing if the units, periods, and numeric integration agree. This category asks for a classic desk-toy simulation: a row of pendulums with slightly different lengths that produce visual beats.
The model must choose appropriate small-angle or full-sin integration, expose user controls, and keep the animation stable for long runs. The visual beat pattern is the observable signature of physical correctness.
Common failure modes
- Using a constant period for all pendulums destroys the beat phenomenon.
- Energy drift from a poor integrator makes the wave pattern drift over time.
- Ignoring pendulum-string geometry makes the bobs slide rather than swing.
Task: Physics Pendulum Wave
Simulate a pendulum wave desk toy in Canvas 2D. Physical accuracy of periods, stable integration, and visual clarity of beats are scored.