Key Takeaways
Lesson Description
Key Takeaways
• Newton's First Law describes inertia.
• Newton's Second Law relates net force and acceleration.
• Newton's Third Law states forces occur in equal and opposite pairs.
• Free-body diagrams identify forces acting on objects.
• Common forces include gravity, normal force, tension, friction, and spring force.
• Static friction is less than or equal to maximum friction.
Must Know Equations
ΣF = ma
Weight:
Fg = mg
Friction:
Fk = μkN
Fs ≤ μsN
Hooke's Law:
Fs = −kx
Must Know Vocabulary
Net Force
Inertia
Normal Force
Tension
Static Friction
Kinetic Friction
Spring Force
AP Exam Focus
• Draw accurate free-body diagrams.
• Apply Newton's Laws to connected objects.
• Analyze forces on inclined planes.