How Do You Lift a Lion? (Wells of Knowledge Science Series)
Wells, Robert E.
ISBN 10: 0807534218 ISBN 13: 9780807534212
Editore: Albert Whitman & Company, 1996
Usato
paperback
Da
Evergreen Goodwill, Seattle, WA, U.S.A.
Valutazione del venditore 5 su 5 stelle
Venditore AbeBooks dal 7 novembre 2006
Questo articolo specifico non è più disponibile.
Riguardo questo articolo
Descrizione:
Codice articolo mon0000565398
Riassunto:
How do you lift a lion? With a machine that's big and powerful with clanking metal parts? There are machines like that. But others have only a few moving parts. In fact, some machines are so simple that they don't seem like machines at all—like the wheel, the lever, and the pulley. These machines can make work easy—even if you're trying to lift a lion!
Estratto. © Ristampato con autorizzazione. Tutti i diritti riservati.:
How Do You Lift a Lion?
By Robert E. WellsALBERT WHITMAN & Company
Copyright © 1996 Robert E. Wells
All rights reserved.
ISBN: 978-0-8075-3421-2All rights reserved.
CHAPTER 1
DID YOU EVER TRY TO LIFT A LION?
You'd have to be awfully strong.
It's because of the force of GRAVITY. Gravity pulls objects downward. When that object is as massive as a lion, it pulls pretty hard.
With a LEVER, you can lift a heavy weight with much less effort.
The main part of a lever is a bar or rod which balances, or pivots, on a FULCRUM.
If the FORCE side is longer than the LOAD side, you will have LEVERAGE. Leverage adds force to your own strength. With a force side this long, you could lift a lion!
So, if you had a lever with a handle THIS long, maybe you could lift them a little!
Gravity is pulling down on that panda. And there's also FRICTION between the ground and the pallet. Friction, or resistance, happens when two surfaces rub together. The more weight pushing on the surfaces, the more friction there is.
(Continues...)
Excerpted from How Do You Lift a Lion? by Robert E. Wells. Copyright © 1996 Robert E. Wells. Excerpted by permission of ALBERT WHITMAN & Company.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.
Le informazioni nella sezione "Su questo libro" possono far riferimento a edizioni diverse di questo titolo.
Dati bibliografici
Titolo: How Do You Lift a Lion? (Wells of Knowledge ...
Casa editrice: Albert Whitman & Company
Data di pubblicazione: 1996
Legatura: paperback
Illustratore: Wells, Robert E.
Condizione: Good