This is the Conservation of Energy lab that actually feels like real physics: students convert gravitational PE → KE, measure exit speed using projectile motion, calculate energy efficiency, and use graphs to extract meaning from data (slope = efficiency!). It’s hands-on, quantitative, and perfect for Physics / AP Physics 1—with built-in troubleshooting, expected results, and a full answer key so it runs smoothly.✅ Grades 9–12 / AP Physics 1 | 2–3 class periods | Pairs or groups of 3✅ Indirect v