Unit 2
âš¡Dynamics
Newton's three laws of motion, free body diagrams, friction, and the normal force.
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Lessons
1
Newton's First Law
Objects resist changes in motion — inertia explained.
12 min→
2
Newton's Second Law
F = ma: the most important equation in mechanics.
18 min→
3
Newton's Third Law
Every force has an equal and opposite reaction force.
12 min→
4
Friction & Normal Force
Real-world forces that act on surfaces.
15 min→
Unit Quiz
AP-format questions: MC, multi-select, and free-response.