Physics is the subject people most often say they understood in the lecture and could not do in the exam. That gap is not a knowledge problem, it is a practice problem: reading a derivation and producing one are different skills, and only one of them is what you are marked on. So the lessons here are things to change, run and be wrong about rather than pages to read.
Friction on a slope. Change the angle or µ while it's moving — the block keeps whatever speed it already had.
Gravity down the slope beats friction, so the block accelerates at a constant 1.40 m/s². That's why speed climbs in a straight line while distance curves upward — distance is the area under the speed graph. Mass never appears in either sum.
You describe the goal in your own words and it asks questions back until the plan is one you would actually follow. These are the shapes that goal usually takes.
Not a fixed syllabus — the plan is built around your goal and cuts what does not serve it. These are the topics it draws from, and whatever you get wrong comes back until it stops coming back.
The mechanics are the same whatever the subject — a slider is a slider whether it is moving a coefficient or a rate of return. What changes is what it is a slider for.
Or see how it works and what it costs.