Interactive Simulations
Adjust real variables and watch real physics respond instantly — the math behind each one is explained plainly, with no equation left hanging and no black boxes.
Lever & Torque
Balance two weights on a lever and see why distance from the pivot matters just as much as weight.
Circuit & Ohm's Law
Turn the voltage and resistance up or down in a simple LED circuit and watch the current — and the brightness — respond.
Beam Load & Deflection
Move a load along a beam and change its stiffness to see what actually makes a structure bend or hold.
Gear Ratio
Resize two meshing gears and watch the exact trade-off between speed and torque play out.
Buoyancy & Density
Figure out why a solid block sinks, but the same material shaped into a hull floats.
Logic Gates
Flip inputs and switch between AND/OR/XOR/NOT gates while the truth table builds itself live.
Projectile Motion
Dial in a launch angle and power, watch the trajectory change, and see why real flight needs more than this.
Pendulum
Change the length and release angle and watch the period respond — notice what's conspicuously missing from the controls.
Heat Conduction
Pick a material and adjust its thickness and temperature difference to see how much heat actually gets through.