The free, fun, and effective way to learn physics!

Yes. Physics rewards working problems far more than reading about them, and a problem has a clear right answer you can check. What self-study usually lacks is feedback on the method, not just the final number. Here each step of a problem is checked as you do it: the forces you drew, the axes you picked, the equation you wrote.

Solve problems, many small ones, with the same routine every time: draw the situation, mark the forces, pick a direction as positive, write the law, then put in the numbers. Most mistakes happen in the first three steps, long before any algebra.

Practise the setup, not the arithmetic. Getting the free-body diagram and the signs right is most of the work, and it is the part a worked solution in a book skips over. Then always check that the units come out right: a wrong unit is a wrong answer.

You need algebra: solving an equation for one letter, and a little trigonometry to split a slanted force into two parts. The course teaches the trigonometry it uses in its first lesson.

Yes. Every physics lesson runs in your browser, free, with nothing to install. Pro removes the daily limit and adds unlimited help from the AI tutor.