Can I Dance on the Moon? All About Gravity - Physics Book Grade 6 | Children's Physics Books , livre ebook
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English
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2017
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64
pages
English
Ebooks
2017
Vous pourrez modifier la taille du texte de cet ouvrage
Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus
Publié par
Date de parution
15 mai 2017
Nombre de lectures
0
EAN13
9781541918870
Langue
English
Poids de l'ouvrage
1 Mo
Publié par
Date de parution
15 mai 2017
EAN13
9781541918870
Langue
English
Poids de l'ouvrage
1 Mo
Can I Dance on the Moon?
All About Gra vity
Physics Book Gra de 6 Children’s Physics B ooks
Speedy Publishing LLC
40 E. Main St. #1156
Newark, DE 19711
www.speedypublishing.com
Copyright 2017
All Rights reserved. No part of this book may be reproduced or used in any way or form or by any means whether electronic or mechanical, this means that you cannot record or photocopy any material ideas or tips that are provided in this book
W hat would it be like to stand on the Moon and try to dance? Would you just float away? Let’s find out how gravity works, on Earth, on our Moon, and everywhere.
What is gravity?
G ravity is one of the basic forces in the universe. It tries to pull together any objects that have mass. The more mass an object has, the more its gravity pulls on every other object with mass.
A ny physical object has mass. That means an apple has mass but an idea of an apple in your head does not have mass.
And here’s a funny thing: we know a lot about gravity and what it does, but we don’t yet know why it does it. Nobody knows what causes gravity!
athens, greece
The pull of gravity
W e live on the Earth. Our bodies have mass and the Earth has mass, and your gravity pulls on the Earth as it uses its gravity to pull you closer to it. The difference, of course, is that the Earth has so much more mass than you do that your gravitational field doesn’t have much effect on the Earth.
H owever, the Earth’s gravity is what keeps you, the stones on the ground, the water in the ocean and the air in the sky from floating off into space!
Earth’s gravity pulls you down toward the center of the planet at a constant rate, every second of every day. Try jumping: your upward force overcomes gravity for a little bit and lifts you into the air, but pretty soon gravity’s pull overcomes your upward force and pulls you back down again.
