Key Takeaways
Lesson Description
Key Takeaways
• Momentum measures an object's motion and depends on both mass and velocity.
• The total momentum of an isolated system is conserved.
• Impulse changes an object's momentum.
• Impulse is equal to the area under a Force-Time graph.
• Elastic collisions conserve both momentum and kinetic energy.
• Inelastic collisions conserve momentum but not kinetic energy.
Must Know Equations
Momentum:
p = mv
Impulse:
J = FΔt
Impulse-Momentum Theorem:
J = Δp
Conservation of Momentum:
Σpi = Σpf
Must Know Vocabulary
Momentum
Impulse
Collision
Elastic Collision
Inelastic Collision
Conservation of Momentum
AP Exam Focus
• Apply conservation of momentum to collisions.
• Interpret Force-Time graphs.
• Compare elastic and inelastic collisions.