Physics Lab
Explore a pendulum and gravity-driven circle collisions with adjustable parameters and fixed-step simulation.
Fixed 1/120-second substeps, maximum 0.05 seconds per displayed frame. Pendulum uses semi-implicit Euler; circle collisions use impulses with overlap correction. Pause or reset to change initial conditions.
Result data
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Using Physics Lab
Explore a pendulum and gravity-driven circle collisions with adjustable parameters and fixed-step simulation.
Try it
Compare pendulum length and gravity, or switch to collisions and vary restitution. These are educational 2D approximations, not engineering-grade solvers.
Processing & privacy
Processing happens on your device. When usage statistics are enabled for this tool, actions, settings, entered data and generated results may be sent to the site’s analytics database. You can disable this using Usage statistics below. Normal hosting access logs may still apply.