This pulley demonstrator kit provides a clear, handson way to study the working principles and characteristics of fixed and movable pulleys. It is designed for classroom demonstrations, lab experiments, and project work where students test hypotheses and measure mechanical effects. Key benefits Handson learning: Assemble and reconfigure the system to observe how fixed and movable pulleys change force direction and mechanical advantage. Modular and reusable: Components can be disassembled and reassembled quickly, making it easy to run multiple experiments and classroom rotations. Clear experimental workflow: Includes suggested experiment ideas in the product images to help users form and test hypotheses about pulley behavior. Practical compatibility: Works with common lab tools such as spring scales, standard masses, and rulers for force and distance measurements. Main features Contents: base, metal bracket, two single pulleys, and cotton thread. All parts are supplied for immediate setup and repeated use. Metal bracket: provides stable support for pulley configurations and repeated assembly cycles. Two single pulleys: allow comparison between fixed and movable arrangements as well as combined systems. Cotton thread: flexible, easy to knot, and suitable for standard classroom loads. Disassemblable design: components separate for storage, transport, and modular experiment setup. What you can study Fixed pulley behavior: Observe how a fixed pulley changes the direction of force without changing the magnitude. Movable pulley behavior: Measure how a movable pulley affects the input force required to lift a load and test the predicted mechanical advantage. Combined systems: Assemble fixed and movable pulleys together to explore compound mechanical advantage, equilibrium, and energy transfer. Experimental validation: Use the included picturebased experiment ideas to generate hypotheses and collect data using common measuring tools. Typical use scenarios Physics classroom demonstration: Show the difference between fixed and movable pulleys during a lesson on simple machines, allowing students to see and discuss results in real time. Laboratory experiment and reporting: Set up repeated trials to measure input force, load, and displacement, then analyze mechanical advantage and efficiency using standard scales and rulers. Science fair or student project: Provide a compact, transportable demonstrator that students can assemble on site to demonstrate pulley principles and compare theoretical predictions with measured data. Practical notes Intended for educational use in physics lessons and handson experiments. Components are designed for easy assembly and disassembly; no special tools required. For quantitative experiments, use appropriate measuring instruments such as spring scales, calibrated masses, and rulers. Package contents (as supplied) Base Metal bracket Two single pulleys Cotton thread This kit focuses on teaching the fundamental mechanics of pulleys through direct observation and measurement, supporting curriculum activities on forces, mechanical advantage, and simple machines.