艾萨克·牛顿爵士和苹果（2）（2/2）
《泰西故事30篇》作者：李汉昭 2017-04-10 17:32
s many millions of times heavier than an apple; so it draws the apple toward it millions and millions of times harder than the apple can draw the other way.
“The earth is millions of times heavier than any object near to or upon its surface; so it draws every such object toward it.
“This is why things fall, as we say, toward the earth.
“While we know that every object draws every other object, we cannot know why it does so. We can only give a name to the force that causes this.
“We call that force Gravitation.
“It is gravitation that causes the apple to fall.
“It is gravitation that makes things have weight.
“It is gravitation that keeps all things in their proper places.”
Suppose there was no such force as gravitation, would an apple fall to the ground? Suppose that gravitation did not draw objects toward the earth, what would happen?
To you who, like Sir Isaac Newton, are always asking “Why?” and “How?” these questions will give something to think about.
“The earth is millions of times heavier than any object near to or upon its surface; so it draws every such object toward it.
“This is why things fall, as we say, toward the earth.
“While we know that every object draws every other object, we cannot know why it does so. We can only give a name to the force that causes this.
“We call that force Gravitation.
“It is gravitation that causes the apple to fall.
“It is gravitation that makes things have weight.
“It is gravitation that keeps all things in their proper places.”
Suppose there was no such force as gravitation, would an apple fall to the ground? Suppose that gravitation did not draw objects toward the earth, what would happen?
To you who, like Sir Isaac Newton, are always asking “Why?” and “How?” these questions will give something to think about.