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▶ Step 1: Identify approach (Conservation of energy) ▶ Step 2: Initial energy = mgh ▶ Step 3: Final energy = ½ mv² ▶ Step 4: Solve for v = √(2gh) = √(2×9.8×3.0) = 7.67 m/s 💡 Common mistake: Forgetting gravity is only force → no friction loss. 📘 Refresher: Work-energy theorem (Section 7.4)
Physics is visual. High-quality solutions will redraw the free-body diagrams or circuit schematics. If the solution you are looking at skips the diagram, it is skipping the most important part of the thought process.