Mechanical engineering,
one slider at a time.

Three knobs decide how a controller closes the gap between where it is and where it wants to be. PID, made tactile by hovering a drone with sliders.

A block on a tilted ramp. Gravity pulls down, friction resists, and an applied force can push uphill. Tilt past the friction angle and gravity wins.

A pipe narrows in the middle. Conservation of mass says the fluid has to speed up; Bernoulli says the pressure has to fall. Watch both effects together.

Push fluid through a pipe — inertia fights viscosity. Their ratio (Reynolds number) sets whether you get smooth Hagen–Poiseuille flow or turbulence.

A beam fixed at one end with a point load at the free end. The classic exhibit of why engineers fear length: deflection grows with the cube of the span.

A six-panel Pratt truss with 12 pin joints and 21 bars. Click any joint to drop a load and watch every bar recolor as forces redistribute through the lattice.

Four reversible processes around a P–V loop. The Carnot cycle is the theoretical maximum efficiency any heat engine can achieve between two reservoirs.

A few grams of water absorb a startling amount of heat by evaporating. That single trick powers sweating, swamp coolers, and steam off your tea.

A mass on a spring with a damper. Pull it aside, let it go, watch it settle. The damping ratio ζ decides whether it rings, dies smoothly, or crawls back.