physicsclassroom.com
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The Physics Classroom is a free, student‑friendly resource offering concept‑based physics tutorials, interactive simulations, animations, and practice problems to build understanding. It covers core topics such as kinematics, dynamics, energy, waves, and electricity through guided lessons and quick assessments.
More resources on Physics
Building Scientific Apparatus
A cross-disciplinary masterclass in the design and construction of specialized research equipment, from vacuum systems to precision optics.
MinutePhysics
Henry Reich's YouTube channel of short hand-drawn physics explainers covering special and general relativity, quantum mechanics, gravity, energy and thought experiments. Each video isolates one idea, helping viewers grasp the core concept and common misconceptions before studying it formally.
Veritasium
Derek Muller's YouTube science channel, built around experiments, demonstrations and interviews with researchers. Videos address mechanics, electromagnetism, relativity, mathematics and common scientific misconceptions, helping viewers test their intuitions against evidence and understand counterintuitive physical results.
Physics for Scientists and Engineers
Calculus-based introductory physics textbook covering mechanics, thermodynamics, waves, electromagnetism, optics, and modern physics. Worked examples and large problem sets build the quantitative problem-solving habits expected in university engineering and physical-science sequences.
phet.colorado.edu
PhET Interactive Simulations from the University of Colorado Boulder provides free, interactive physics (and science) simulations that let learners explore core concepts—motion, forces, energy, waves, electricity, and magnetism—by adjusting parameters and observing outcomes. It also offers downloadable simulations and ready-to-use activities for teaching and learning introductory physics.
The Feynman Lectures on Physics
Caltech's free authorized HTML edition of Feynman's three-volume undergraduate lecture course, covering mechanics, electromagnetism, and quantum mechanics with the original figures and equations. Read for physical intuition and argument rather than as a problem-solving textbook.