Key Takeaways
Lesson Description
Key Takeaways
• Uniform circular motion requires centripetal acceleration.
• Centripetal force always points toward the center of the circle.
• Gravity provides centripetal force for planetary motion.
• Satellites remain in orbit because gravity continuously changes their direction.
Must Know Equations
Centripetal Acceleration:
ac = v²/r
Centripetal Force:
Fc = mv²/r
Universal Gravitation:
Fg = Gm₁m₂/r²
Must Know Vocabulary
Centripetal Force
Orbital Motion
Universal Gravitation
Satellite
AP Exam Focus
• Explain why circular motion requires inward force.
• Analyze orbital motion conceptually.