New here? Start with these.
No prior physics knowledge assumed. These are the topics we'd recommend reading first — once you're comfortable, head to Learn to browse everything by topic and level.
Kinematics: Describing Motion
Before you can explain why things move, you need the vocabulary to describe how they move.
BeginnerNewton's Laws of Motion
The three rules that describe how and why objects move the way they do.
BeginnerEnergy and Work
What physicists actually mean by 'energy' and 'work' — and how they're connected.
BeginnerTypes of Forces You Actually Deal With Every Day
Gravity gets all the attention, but friction, tension, and the normal force are doing just as much work.
BeginnerProjectile Motion: Why Everything Thrown Follows a Curve
A thrown ball, a kicked football, and a launched water balloon all trace out the exact same shape — here's why.
BeginnerMomentum and Collisions
Why a loaded truck is so much harder to stop than a bike — and what really happens when things crash.
BeginnerCircular Motion: Why Turning Always Means Accelerating
You don't have to speed up or slow down to be accelerating — you just have to change direction.