phys203 - homework 2_Solutions

phys203 - homework 2_Solutions - Homework 2 1. Aristotles...

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Homework 2 1. Aristotle’s observations to support the notion that the earth is a sphere included the shape of the earth’s shadow on the moon. He noticed that it was curved and so concluded that the earth had to be spherical. Furthermore, he observed that a ship’s hull is the first thing to disappear as it travels further away from shore. Also, Aristotle observed that you can’t see all of the stars in the sky at one position. As you move north the starts that you can see change. If you could see all of the stars from anywhere, the earth would be flat. 2. Aristotle’s theoretical explanation that the earth is a sphere involved his belief in the fact that all objects, particularly rocks are drawn to the center of the earth. That is why, when you throw a stone in the air, it returns to the earth. Furthermore, it is why stones on the other side (bottom) of the earth do not fall into an abyss. They are attracted to the center of the earth. His basic thoughts on what would be determined to be gravity laid the ground work for his theory of a spherical
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This homework help was uploaded on 02/20/2009 for the course PHYS 203 taught by Professor Padamsee, h during the Spring '08 term at Cornell.

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phys203 - homework 2_Solutions - Homework 2 1. Aristotles...

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