Many simple machines use a pulley in order to change the direction of a force. Pulleys also allow you to use the force of gravity so that less initial force is required. You can design your own model of a pulley for science class, or even to be included in a science fair. All you'll need is a few simple materials you can find around the house, as well as a place to hang your model.
Things You'll Need
- Wire cutter
- Wire coat hanger
- Wooden spool
- Weight (e.g., book)
Use the wire cutter to cut through the bottom of the hanger.
Slide the spool onto one of the cut ends of the hanger and poke the other end through so that a wire end protrudes from each end of the spool.
Bend down both wire ends to keep the spool in place.
Hang the hanger from a sturdy place, such as a hook or a closet pole.
Slide a string over the top of the spool, and tie the weight to one end of the string.
Pull the other end of the string to demonstrate how a pulley works.
Tips & Warnings
- Use a spring scale to demonstrate how the pulley reduces the force needed to lift an object.
- Be careful when handling the sharp edges of the cut wire.
- Photo Credit pulley of a boat image by timur1970 from Fotolia.com
How to Make a Pulley
Whether it is for a school project or to help you with moving things in your house, a pulley is a great...
How to Build a Model Elevator
How to Build an Elevator Pulley. How to Build a Model Elevator; Comments. 711707485 Jun 24, 2012. Do you have a picture...
How to Make a Miniature Pulley
You can make a miniature pulley at home from household items. Other People Are Reading. How to Make ... How to Make...
How to Build a Crane for a School Project
Cranes use a pulley system to reduce the strain and increase the weight that can be moved. ... A model crane can...
How to Make a Toy Flagpole With a Pulley
Many kids like to hoist a flag up and down a flagpole, but they do not really understand how the pulley system...
How to Build Levers and Pulleys
Make a pulley by setting up two wood or foam blocks. ... How to Build a Model Lever. Ten Different Types of...
How to Make a Pulley for Children
Maybe you're learning about simple machines, or maybe you're just interested in how they work. In either case, a great way to...