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Pulley Bridge

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Pulley Bridge


It is a bridge that can be opened and closed using a pulley system.



Materials :
  • Cardboard
  • Thread
  • Sausage Stick
  • Masking Tape
  • Double-Sided Tape
  • Bottle Cap
  • Scissors

Challenges:


  1. Create a bridge that can open from either side or both sides using a pulley system.
  2. The cardboard must be balanced while pulling the thread to ensure smooth movement.
  3. The bridge must not collapse or fold when tilted to open or close.

Questions to be asked:


  1. How does the thread help the platform move to open and close?
    The thread pulls the platform up when tightened and lowers it when released, working like a pulley system.
  2. What happens when the thread isn't tight enough?
    If the thread is loose, the platform may not lift properly or stay in place.
  3. Why should the cardboard used as a bridge be flat and strong?
    A flat and strong cardboard bridge ensures stability and prevents bending or breaking under weight.
  4. How can we make sure the bridge is stable enough when we pull the thread?
    We can secure the bridge by using strong cardboard, tying the thread properly, and fixing the base firmly.

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