Question: User: Scene 1: The Lab Cart Collision (Hook & Opening Question)Visual Prompt: 3D physics animation of two laboratory carts on a smooth horizontal track. Cart A ($m_A$) moves right at speed $v$, hitting stationary Cart B ($m_B$). Velcro pads on their ends lock together upon impact with a visible spark/shockwave effect. They move together at a slower combined velocity $v'$. A glowing overlay displays total momentum conserved while total kinetic energy decreases. Text / Voiceover: "When two carts collide and stick together, why does their total speed drop, and where does the missing kinetic energy go? Momentum is fully conserved, but kinetic energy transforms into other energy forms!"