======Simple Pully System======


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**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Categories:** {{$demo.categories}}
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**Alternative titles:** DIY Pulley, Build Your Own Pulley
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====Summary====                   
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====Procedure====  
  - Cut two circles from cardboard and poke a hole in the center of each.  
  - Glue the cardboard circles onto either side of a thread spool to create rims for the pulley wheel.  
  - Make a handle on a cup by poking two holes, threading string through, and tying securely.  
  - Slide the spool onto a piece of wire to serve as the axle.  
  - Suspend the wire between two sturdy supports, such as chairs or door handles.  
  - Loop the string over the spool so the cup hangs down.  
  - Place marbles or other small objects in the cup and pull the string to lift the load.



====Links==== 
Skill Building | Simple Machines: Pulley - KID Museum: 
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📄 Simple Pulley System For Kids - Little Bins for Little Hands: [[https://littlebinsforlittlehands.com/pulley-simple-machine/]]\\


====Variations====
  * Add more spools to create a compound pulley and compare the effort needed.  
  * Replace the cup with a toy bucket to lift larger items.  
  * Design a toy elevator or flagpole using the pulley system.  
  * Use a spring scale to measure the difference in force between pulley setups.



====Safety Precautions====
  * Use scissors carefully when cutting cardboard and string.  
  * Ensure the pulley support (chairs or handles) is stable and will not tip over.  
  * Avoid overloading the cup to prevent breaking the string or dropping objects.




====Questions to Consider====
  * How does a pulley make lifting easier? (It reduces the force needed or changes the direction of the force.)  
  * What happens if you add more pulleys to the system? (You gain more mechanical advantage, so less force is required to lift the load.)  
  * Where do you see pulleys being used in everyday life? (Examples: elevators, cranes, flagpoles, clotheslines, window blinds.)