Physics you can drag, slide and measure
Free, open tools for students who learn better by seeing motion than by reading about it — eight interactive sandboxes plus animated modern-physics explainers, all in the browser.
Forces — part of iLabs — is a free set of browser-based physics learning tools built for students: a mechanics playground (projectile motion, free fall, collisions, pendulum/SHM with live v-t and s-t graphs), a circuit builder (a custom series/parallel circuit of up to 15 resistors, bulbs and capacitors with live current/voltage readouts and an animated current-flow view), an optics lab (ray diagrams for mirrors and lenses), a waves & sound lab (standing waves, interference, the Doppler effect), a rotational motion sandbox (torque, a rolling-shapes race, angular momentum conservation), a thermodynamics visualizer (a kinetic-theory gas box with measured pressure, and a PV-diagram piston sandbox), and an electricity & magnetism lab (traced field lines, electromagnetic induction, an R-L-C phasor diagram), a logic gate lab (wire up to 10 AND/OR/NOT/NAND/NOR/XOR/XNOR gates and check the answer with a slow, explained reveal), plus animated modern physics explainers on the Bohr model, the photoelectric effect and semiconductor bands, alongside a learn section, mini-games, a quiz and a constants reference. No sign-up, works on any device, always free.
Mechanics playground
Projectile motion, free fall, collisions and pendulum/SHM — sliders for mass, angle, velocity and gravity, with live v-t and s-t graphs.
liveCircuit builder
Build a custom series or parallel circuit with up to 15 resistors, bulbs and capacitors, set the battery's internal resistance, and watch the current actually flow — covers class 10 + 12 electricity in one tool.
liveOptics lab
Ray diagrams for mirrors and lenses, a draggable object and focal point, and live image formation — covers class 10 light and class 12 ray optics.
liveWaves & sound lab
Standing waves on a string, two-source interference with a draggable detector, and the Doppler effect — covers class 11 waves and class 12 sound topics.
liveRotational motion sandbox
Torque and balance, a rolling-shapes race (why the solid sphere always wins), and a spinning disk that conserves angular momentum — class 11 rotational mechanics.
liveThermodynamics visualizer
A kinetic-theory gas box with pressure measured from real particle collisions, and a PV-diagram piston sandbox for all four classic processes.
liveEM lab
Draggable charges with real traced field lines, a moving magnet inducing EMF by Faraday's law, and a live R-L-C phasor diagram — class 12 electrostatics, EMI and AC.
liveAtomic & nuclear explainers
Animated diagrams (not a sandbox) on Bohr's hydrogen orbits, the photoelectric effect, and semiconductor energy bands — class 12 modern physics.
liveLogic gate lab
Wire up to 10 AND/OR/NOT/NAND/NOR/XOR/XNOR gates together, then press Check answer for a slow, fully-explained reveal of how the signal reaches the output — class 12 digital electronics, plus 10 preset circuits and JEE/NEET-style practice questions.
livePhysics quiz
151 questions across classes 9 to 12, pick-a-level and answer 10 at random, with an explanation for every answer.
livePhysics mini-games
Free Body Diagram, Circuit Match, Unit Rush, Ray Tracer, Wave Reader, Logic Rush, Torque Balance, Gas Process, EM Quiz and Quantum Quiz — ten quick drill games.
Physics constants
Speed of light, gravitational constant, Planck's constant and more — 2019 SI values with a note on where each is used.
Why this exists
Physics gets taught as formulas to memorise long before students ever see the motion, the circuit, or the ray those formulas describe. Forces flips that: drag the pendulum, build the circuit, move the object past the lens — and watch the graph or the image form in real time, then connect it back to the equation.
Forces launched fast: eight interactive labs, three animated explainers, four practice games, a 151-question quiz and a constants reference are all live today — built the same way Re-agents (iLabs' chemistry side) was, one real, verified piece at a time rather than a big all-at-once promise.
Frequently asked questions
What is Forces?
iLabs' physics lab: eight interactive labs (mechanics, circuits, optics, waves & sound, rotation, thermodynamics, electricity & magnetism, logic gates), three modern-physics explainers, four practice games, a 151-question quiz and a constants reference — for classes 9 to 12.
Is Forces free? Do I need an account?
Every tool is free with no account or sign-up.
Who is it for?
School students following classes 9 to 12 physics, and anyone who learns better by watching a simulation than by reading about one. Advanced topics are planned.