Roseann Feldmann - Put Inclined Planes to the Test
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- Book:Put Inclined Planes to the Test
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- Publisher:Lerner Publishing Group
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- Year:2017
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For my son, Tim.
Love you forever RF
Copyright 2012 by Sally M. Walker and Roseann Feldmann
All rights reserved. International copyright secured. No part of this book may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means
electronic, mechanical, photocopying, recording, or otherwisewithout the prior written
permission of Lerner Publishing Group, Inc., except for the inclusion of brief quotations in
an acknowledged review.
Lerner Publications Company
A division of Lerner Publishing Group, Inc.
241 First Avenue North
Minneapolis, MN 55401 U.S.A.
Website address: www.lernerbooks.com
Library of Congress Cataloging-in-Publication Data
Walker, Sally M.
Put inclined planes to the test / by Sally M. Walker and Roseann Feldmann.
p. cm. (Searchlight booksHow do simple machines work?)
Includes index.
ISBN 9780761353249 (lib. bdg. : alk. paper)
1. Inclined planesJuvenile literature. I. Feldmann, Roseann. II. Title.
TJ147.W345 2012
621.8dc22 2009032228
Manufactured in the United States of America
1 DP 7/15/11
when you walk up the stairs.
you climb a ladder.
It may surprise
you to learn that
playing is work too.
opposite of play. Work is using force to move an object
from one place to another. Force is a push or a pull. You
use force to do chores and to play.
container from one place to another, so she is doing work.
new place. Then you have done work. The distance that
the object moves may be long or short. But the object
must move.
the top of the hill.
up a hill. You are doing work.
Building Isnt Work
is not work. Its not
work if you sweat.
Its not work even if
you push until your
arms feel like rubber.
No matter how
hard you try, you
have not done work.
The building has
not moved. If the
building moves, then
you have worked!
to push against this building. But the building is not moving. Are the kids doing work?
doing work easier. Machines are
tools that make work easier. Some
of them make work go faster too.
is a machine with many moving parts. What do we call machines with many moving parts?
complicated machines. It may be hard to understand
how complicated machines work. Escalators and
bulldozers are complicated machines.
are easy to
understand. They
are called simple
machines. Simple
machines have
few moving parts.
playground. They are so simple that most people dont
realize they are machines.
moving parts. It is
a simple machine.
plane is a
simple machine.
An inclined plane
is a flat surface.
One end is higher
than the other.
Using an inclined
plane makes it easier
to lift or lower heavy
objects.
thick books, a heavy weight, and the board from a family
game. The heavy weight might be a 5- pound (2- kilogram)
bag of flour. Or you could use a very large can of food.
PLANE MAKES WORK EASIER. THESE ARE
THE THINGS YOU WILL NEED.
on a table. Put the
weight next to the
books. Try to lift
the weight up onto
the books with one
hand. Use two
hands if you have
to. Lift it several
times. Lifting the
weight straight up
takes a lot of force.
game board should be folded in half. The top end of the
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