How to Make a Simple Machine Project for School

A pulley is made to alter the direction of a tensile force.
••• cistern pulley image by JCVStock from

A simple machine is a device that changes the magnitude and/or direction of force. The six classical simple machines are the lever, the wedge, the screw, the inclined plane, the pulley and the wheel and axle. A complex machine is made from a combination of these six simple machines in order to perform more complex tasks. Simple machines rely on both the principle of force and the principle of torque in order to achieve their desired results.

    Glue the safety clip to one end of the rope so you can fasten your rope to various objects.

    Have a volunteer hold the pulley stationary in the air as you wrap the rope around it. Clip one end of the rope to a chair or other object, and pull on the other end of the rope. The effort it takes to move the chair shows how force on your end of the rope is redirected to pull the object directly toward the pulley.

    Wrap the rope around two pulleys, showing how the pulleys can be compounded to redirect the force twice.

    Things You'll Need

    • 2 pulleys
    • Rope
    • 2 human volunteer
    • Safety clip
    • Glue

Related Articles

What Are the Different Classes of Levers?
How Do Pliers Work As a Lever?
How to Make a Pulley for Children
Newton's Laws of Motion
Principles of Levers
Science Fair Projects on Levers, Wedges & Pulleys
How to Solve Atwood Machine Problems
How to Make a Pulley
What Are the Two Basic Families of Simple Machines?
How Does a Pulley System Work?
The Four Forces That Influence Wind Speed & Wind Direction
How to Make a Compound Machine for a 3rd Grade Science...
How to Calculate Pulley Systems
A Lesson to Introduce Simple Machines
How to Calculate Acceleration With Friction
What Simple Machines Make a Wheelbarrow?
How to Calculate Kinetic Energy
How to Calculate Pendulum Force
How to Calculate Pneumatic Cylinder Force