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This ducted propeller unit drives a ship through still water at a speed of 4.5 m/s. Within the duct the mean velocity of the water relative to the unit is 15 m/s. Calculate the propulsive force produced by the unit. Calculate the force exerted on the fluid by the propeller. Account for the difference between these forces.
P10.80
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Fox and McDonald's Introduction to Fluid Mechanics
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