Interactive Physics
Visualizer.
A little wonder. A big “why?”Launch a ball. Bend a ray. Catch a wave. Make the invisible click.
Find your next experiment ↗Which angle goes the farthest?
What if you changed…
Physics Simulations & Visual Calculators
What happens if…? There’s only one way to find out.
Position, velocity & acceleration
Connect a moving object to its position–time and velocity–time graphs.
Energy on a ramp
Watch gravitational potential energy turn into kinetic energy on a frictionless ramp.
Pendulum explorer
Change length and gravity to discover what controls a pendulum’s period.
Traveling wave explorer
Connect wavelength, frequency, wave speed, and particle motion on one traveling wave.
Series & parallel resistors
Compare equivalent resistance, branch currents, and voltage drops in two-resistor circuits.
Refraction & total internal reflection
Change the incident angle and refractive indices to see a ray bend or reflect internally.
Make your next “aha” stick.
Eight questions. Clear explanations. All the time you need.
Physics Lab: frequently asked questions
Wondering about the why? Start here.
What can I explore in Physics Lab?
Twelve interactive experiments cover projectile motion, motion graphs, forces, energy, oscillations, waves, electrical circuits, buoyancy, refraction, and lenses. Change an input to see the diagram, measurements, and worked calculation respond.
Find an experimentIs Physics Lab free?
Yes. Experiments, lessons, quizzes, worksheets, and diagram downloads are free without an account. All calculations happen in your browser.
Are the simulations physically realistic?
They use standard introductory physics models. Every experiment explains its assumptions, such as no air resistance, no friction, a small-angle approximation, or ideal circuit components. Use them to understand relationships rather than as engineering design tools.
Can I use this in a lesson?
Yes. Share a link containing your experiment settings, download an SVG diagram, or print a worksheet with an optional answer key. The practice studio also gives an explanation after every answer.
Create a worksheetWhere should I begin?
Try changing the launch angle in the projectile experiment. Predict which angle sends the ball farthest, then test it. Follow the linked lesson when you want to understand why.
Explore projectile motion