Forces, stress & system models — the foundational principles behind every engineering discipline.
Pull a cart up an inclined track and separate gravity, the normal reaction, your applied pull and friction into a free-body diagram.
Load a wrench on an elastic torsion shaft, change the force angle and lever length, and watch damping settle the rotation.
Run a virtual tensile test through loading and unloading and watch a stress-strain curve form, with permanent extension remaining after yield.
Compare identical round members under equal tensile and compressive loads, and see a pinned column approach its Euler buckling threshold.
Fill a transparent vessel and read gauge pressure and force on a submerged horizontal plate as depth and liquid density change.
Lift a hanging load with a two- or four-part block and tackle and compare hand force, hand travel, load travel and input work.
Lower a mass on a cable drum that drives a generator and watch gravitational energy become electrical output and heat.
A motor positions a geared arm under PID control; change the setpoint, inject load torque or sensor bias and see what the controller corrects.
Drive a motor, gear reducer and dynamometer, separate the loss at each stage and watch a shared cooling mass warm toward equilibrium.
Charge a capacitor through a resistor and connect the physical circuit to a first-order block model, the exponential response and an energy balance.