Stopmemorizingformulas.Startvisualizingthem.

Change something. Watch the physics answer.

1. 1

   Pick a simulation

   Choose from simulations spanning every school level, each tagged so you can match it to your curriculum.

2. 2

   Change a variable

   Drag a slider — mass, gravity, spring constant — and our own physics engine recomputes every force on every frame.

3. 3

   See the math move

   Velocity vectors, energy bars and trajectories respond instantly, so the equation finally means something.