There are many great free online courses available to learn physics. Here are a few of the best:

• How Things Work: An Introduction to Physics by University of Virginia on Coursera. This course is a great introduction to the basic concepts of physics, and it covers a wide range of topics, from forces and motion to electricity and magnetism.
• Introduction to Mechanics by Rice University on Coursera. This course is a more in-depth look at the principles of mechanics, and it covers topics such as Newton’s laws of motion, work and energy, and momentum.
• Understanding Einstein: The Special Theory of Relativity by Stanford University on Coursera. This course provides an introduction to Einstein’s theory of special relativity, and it covers topics such as the nature of space and time, the speed of light, and mass-energy equivalence.
• Mechanics: Motion, Forces, Energy and Gravity, from Particles to Planets by UNSW Sydney (The University of New South Wales) on Coursera. This course covers the fundamental concepts of mechanics, from the motion of individual particles to the motion of planets and galaxies.
• From the Big Bang to Dark Energy by The University of Tokyo on Coursera. This course explores the history of the universe, from the Big Bang to the present day. It covers topics such as cosmology, astrophysics, and dark energy.
• Exploring Quantum Physics by University of Maryland, College Park on Coursera. This course provides an introduction to quantum mechanics, and it covers topics such as the wave-particle duality, the uncertainty principle, and quantum entanglement.
• Particle Physics: an Introduction by University of Geneva on Coursera. This course provides an introduction to particle physics, and it covers topics such as the Standard Model, quarks, and the Higgs boson.

These are just a few of the many great free online courses available to learn physics. With a little bit of effort, you can learn the basics of physics and even advance your knowledge to a more advanced level.

Here are some additional tips for learning physics on your own:

• Start with the basics. Don’t try to learn too much too soon. Start with the basics of physics, such as forces and motion, and then gradually build your knowledge from there.
• Use online resources. There are many great online resources available to help you learn physics. In addition to the courses listed above, you can also find helpful articles, videos, and tutorials on websites like Khan Academy, MIT OpenCourseWare, and YouTube.
• Practice, practice, practice. The best way to learn physics is by practicing. Solve problems, work through exercises, and take practice tests. The more you practice, the better you will understand the concepts and the more confident you will become in your abilities.
• Don’t be afraid to ask for help. If you get stuck, don’t be afraid to ask for help from a tutor, teacher, or friend. There are also many online forums where you can ask questions and get help from other learners.

With a little bit of effort, you can learn physics on your own. So what are you waiting for? Start learning today!