Physics Quiz Challenge
Test your physics knowledge across six topics with 60 original questions, instant explanations, progress tracking, and a score to beat.
Start with a branch
Six branches of physics. Every branch has articles, calculators and a cheat sheet.
Classical Mechanics
Forces, energy, momentum and motion.
7 articles18 calculators
Kinematics
Describing motion: velocity, acceleration and trajectories.
7 articles5 calculators
Electromagnetism
Charge, current, fields, circuits and magnetism.
7 articles9 calculators
Thermodynamics
Heat, temperature, energy and entropy.
6 articles5 calculators
Waves & Optics
Waves, sound, light, lenses and interference.
6 articles7 calculators
Modern Physics
Quantum mechanics, relativity, atoms and beyond.
7 articles6 calculators
Articles worth reading first
Original articles with the working shown, not just the answer.
Calculators
Fifty calculators that show the working, step by step.
| Calculator | Formula | Branch |
|---|---|---|
| Banked Curve Calculator | tan θ = v² ÷ (r × g) | Classical Mechanics |
| Buoyancy Calculator | F_b = ρ × V × g | Classical Mechanics |
| Centripetal Force Calculator | F_c = m × v² ÷ r | Classical Mechanics |
| Circular Motion Calculator | a = v² ÷ r | Classical Mechanics |
| Escape Velocity Calculator | v = √(2 × G × M ÷ r) | Classical Mechanics |
| Gravitational Field Calculator | g = G × M ÷ r² | Classical Mechanics |
| Gravitational Potential Energy Calculator | PE = m × g × h | Classical Mechanics |
| Hooke's Law Calculator | F = k × x | Classical Mechanics |
| Impulse and Momentum Calculator | J = F × Δt = Δp | Classical Mechanics |
| Kinetic Energy Calculator | KE = ½ × m × v² | Classical Mechanics |
Games
Six interactive games. Learn by doing, not by reading.
Projectile Motion Simulator
Launch a projectile, adjust angle and speed, watch the trajectory unfold, and try to hit the target flag downrange in this simulator.
Pendulum Simulator
Swing a pendulum on Earth, the Moon or Jupiter. Change the string length and gravity and watch the period change live as it swings.
Wave Interference Visualiser
Two wave sources, one pattern: explore constructive and destructive interference and reveal the nodal lines in this animated visualiser.
Circuit Builder
Build a series or parallel circuit with up to three resistors and see resistance, current, voltage and power update live.
Physics Unit Converter
Convert length, mass, time, energy, temperature and speed instantly, with the exact factors physicists use for homework and lab work.
Cheat sheets
Every key formula for a branch, on one page.
| Branch | Formulas | About |
|---|---|---|
| Classical Mechanics | 34 | Forces, energy, momentum and motion. |
| Kinematics | 22 | Describing motion: velocity, acceleration and trajectories. |
| Electromagnetism | 29 | Charge, current, fields, circuits and magnetism. |
| Thermodynamics | 19 | Heat, temperature, energy and entropy. |
| Waves & Optics | 25 | Waves, sound, light, lenses and interference. |
| Modern Physics | 27 | Quantum mechanics, relativity, atoms and beyond. |