Potential Energy Curves

Core Sentence / 核心句

A potential-energy curve encodes force in its negative slope and kinetic energy in the gap below the total-energy line.

\qquad K=E-U\ge0$$ ## Reading Rules / 读图规则 - $U\le E$: allowed region； - $U=E$: turning point； - local minimum: stable equilibrium； - local maximum: unstable equilibrium。 ## Watch Out / 易错点 turning point 只说明瞬时 $v=0$；若 slope 不为零，它不是 equilibrium。 ## Mentioned In / 出现位置 - [[AP物理C力学第6次正课-功功率势能与机械能守恒#9. Potential-Energy Curves / 势能曲线|第6次正课 · curve rules]] - [[AP物理C力学第7次正课-能量综合势能曲线与动量入门#6. Reading a Potential-Energy Curve / 读势能曲线|第7次正课 · curve application]] ## Connected Notes / 连接 - [[Conservative Forces and Potential Energy]] - [[Mechanical Energy Conservation]] - [[Derivatives]]