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Politics : Formerly About Applied Materials

AMAT 256.89

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Dec 31 3:59 PM EST

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To: Jacob Snyder who wrote (58709)	1/12/2002 1:37:45 AM
From: Ross	Read Replies (1) of 70976

If you want a simple explanation, think of it this way - the force of the Moon on a chunk of the Earth will be greater on a piece of the Earth close to it than on the center of the Earth, so it pulls out a bulge of water. On the other hand, the force on a piece of the center of the Earth will be greater than the force of the Moon on a piece of the Earth on the far side, so the center gets pulled away from the far side, leaving a bulge of water on the back side. The water to make the two bulges flows from the sides. The explanation using the "centrifugal" force is somewhat misleading, even if it describes the correct answer. The centrifugal force (at least used this way) is a fictitious force that describes what happens in a rotating reference system. When you go around the corner in your car, you may feel like you are thrown to one side or another. This is described as the result of a centrifugal force, but that does not really exist. It is the result of inertia - your body goes straight while the car turns. So, it shouldn't be said in the explanation of the tides that centrifugal force balances gravity. Ross

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