Ch7Energy Conservation (and not)Conservative and Non-Conservative ForcesTypes of Energy – Kinetic and Potential (a hidden mess!)

• Kinetic Translational• Kinetic Rotational• Gravitational Potential• Spring Potential• Electric Potential• Chemical Potential• Thermal

Why use energy? • Interdisciplinary: biology, chemistry, technology, policy, etc.• The Roller Coaster Problem

ProblemsThe Roller Coaster ProblemPhETWorksheet B4-CT28Skidding to a StopMasses over a PulleySpring problemGravity (escape speed)13.32Jeopardy questionsPower

Ch7Examples • Physical situation• Representation

• Narrative -- Transformations• Conceptual – System,

Before/After, friction, applied forces, etc.?

• Visual – Drawing, zero?• Mathematical – Set up

equations• Solution• Interpretation

• Units• Limiting cases• Reasonableness

Ch7Potential Energy Diagrams• Equations• Stable vs. Unstable• Turning Points• SHO approximation• Total Energy• Kinetic Energy• Gravitational Analogy• Calculus