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This means the magnitude of the moment is independent of a.
Thus the moment of a couple is the same about any point. |
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Any number of forces can be combined into one resultant force if they all act in plane and pass through the same point.
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| Generalisation of force, couple systems |
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Definition
It can be shown that any system of forces and couples can be replaced by a single force F.
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| Constant Fluid pressure equation and first use. |
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Definition
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Where F is the force per unit width. |
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| Second Constant Fluid pressure use |
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