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24K views · 466 reactions | *Pulley Systems* ️ - Used to _lift loads_ with _less effort_ - Types: Fixed, Movable, Block & Tackle *Velocity Ratio (VR)*  - VR = distance effort moves / distance load moves - Example: 2-pulley system → VR = 2 *Efficiency (η)* ⚙️ - η = (load × distance load moves) / (effort × distance effort moves) - η = (Mechanical Advantage / VR) × 100% - Friction reduces η  #science #waec2026 #schools #stemeducation | Simplified Science | Facebook
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