How to Make a Pulley

••• Charley Steward/Demand Media

Whether it is for a school project or to help you with moving things in your house, a pulley is a great gadget that has been around for centuries. Put your mechanical abilities to use and create your own pulley.

    ••• Charley Steward/Demand Media

    Determine the strength and size of the wheel or spool and cord you will use to lift the object. For this demonstration, consider lifting a pencil from a desk to the top of a cabinet by a pulley.

    ••• Charley Steward/Demand Media

    Bend the wire into a triangular shape, inserting the ends into an emptied thread spool, and attach the wire to a fixed object, such as a cabinet. The spool should turn easily.

    ••• Charley Steward/Demand Media

    Attach a paper clip to one end of the string, and hang the cord over the spool, leaving enough to reach the desk. Tie the pencil to the string.

    ••• Charley Steward/Demand Media

    Pull gently on the other end of the string that holds the paper clip, and watch the pencil be lifted to the cabinet.

    ••• Charley Steward/Demand Media

    Experiment with a double-pulley system. This is basically the same, but works with less effort from the operator of the pulley. Take two spools instead of one and run a cord around them, tying the ends together to create a loop. Put a pencil through the spools and affix the pencils to an object, making sure the spools can move. Write a message and attach it to the cord with a paper clip. Pull the cord to move the message from one end to the other. The more complex the pulley system, the less effort is needed to lift or move the object.

    ••• Charley Steward/Demand Media

    Explain the pulley system and the benefits of a more detailed pulley system to students. Have two people hold broomsticks. Tie one end of a rope to one of the broomsticks; wrap the other end around the second broomstick. Have your helpers try to pull them together by using the free end of the rope. Wrap the free end around the first broomstick again, and try to pull them together. Do it again, wrapping it around the second broomstick. This shows how a pulley works more efficiently the more loops it has. Once you get the concept, the pulley will be a great help to you in different scenarios.

    Things You'll Need

    • Wire
    • Wheel or spool
    • String

Related Articles

How to Make a Block and Tackle System
Experiments With Pulleys
How to Make a Pulley for Children
How to Build a Crane for a School Project
How to Build a Model Elevator Science Project
How to Make a Compound Machine for a 3rd Grade Science...
How to Calculate the Speed of Two Different Pulleys
Difference Between Simple & Compound Machines
A Lesson to Introduce Simple Machines
What Simple Machines Make a Wheelbarrow?
How Does a Pulley System Work?
How to Make a Simple Machine Project for School
How to Build an Elevator Pulley
The Difference Between a Pulley and a Sheave
What Are the Different Classes of Levers?
Simple Machines for Preschoolers to Make
What Is the Difference Between a Windmill & a Wind...
The Disadvantages of Pulleys
How to Make an Elevator for a Science Fair Project
How to Make a Screwdriver Magnet