SIMPLE MACHINES FOR KIDS
SIMPLE MACHINES FOR KIDS
Andi Diehn
Illustrated by Micah Rauch
ISBN Softcover: 978-1-64741-090-2
ISBN Hardcover: 978-1-64741-087-2
Educational Consultant, Marla Conn
Questions regarding the ordering of this book should be addressed to Nomad Press PO Box 1036, Norwich, VT 05055 www.nomadpress.net
When we have some heavy lifting to do—
A boulder on our banana,
A rhinoceros on our raspberries,
A pyramid on our pizza—
Our best bet?
Build a pulley!
A rope, a wheel, and some tugging power are all you need
To magnify your muscles,
Amplify your effort,
And lift more than you ever have before.
What might happen if an elephant sat on your book and REFUSED TO MOVE?
What can you do?
Even a baby elephant is TOO HEAVY for humans to move!
You need help. You need a simple machine!
Simple machines help us do work.
A PULLEY is a simple machine.
A pulley is made of at least one wheel and a rope or chain.
Other simple machines include screws, levers, wedges, inclined planes, and wheels and axles.
Here’s how a pulley works:
One end of the rope is attached to the HEAVY OBJECT you need to move— this object is called the LOAD.
Like the elephant!
Your rope is threaded around the wheel, which has a GROOVE so the rope doesn’t SLIPOUT.
To work the pulley, someone PULLSat the loose end of the rope.
What happens?
UP GOES THE ELEPHANT!
A simple machine is a device that changes the direction or strength of a force.
Did you suddenly get VERY, VERY STRONG?
No—that’s the power of the pulley.