Thursday, September 13, 2007
Inertia
Some people are confused about inertia regarding it as a force or as something caused by distant matter in the universe. Why is there inertia? A consequence of it is that the velocity of an object does not change unless there is a force acting on it. Suppose that this were not true. Then objects would just move randomly, starting and stopping for no reason, moving erratically, unpredictably. There would be no law. But if there were no laws how can we say that inertia is due to distant matter? That would be meaningless since it would be impossible to predict or explain anything. Explanations like a fictitious force or distant matter would be meaningless. Nothing could be said. There has to be inertia otherwise there could be no physics. For related discussions see the OAIU book.
Physicists like to take the obvious and develop convoluted and impossible theories to explain what is beyond explanation. This explains nothing about physics but much about physicists.
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