Fixed vs Movable Pulley

Movable setup requires less pulling force but more rope. Ask students to predict what will happen. Lift same load with fixed pulley and movable pulley. Key idea: Mechanical advantage trades distance for force. Ask: Where did the 'saved force' go? Safety and cleanup: Secure overhead support; small loads only. https://www.google.com/search?q=%22Fixed+vs+Movable+Pulley%22+science+demonstration+experiment