De Motus

What is Force?

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Part 1

The Nature of Force

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Part 2

The Nature of Force

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Part 3

Action and Reaction

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Section 21

The soul, mind, or spirit is the principle of motion

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Section 30

Action and Reaction

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Part 4

The Nature of Motion

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Part 6

What is Force?

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Section 52

What is Force?

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Section 60

What is Force?

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Section 60