Question

A ship of length 50 m is to be designed for a cruising speed of 20 knots (37 km/h) in seawater of relative density 1.015. Tests are to be carried out on a scale model of length 1 m in freshwater.Assuming dynamic similarity, determine the required water speed for the model, and calculate the resistance to motion for the full-scale ship if the model resistance is 16 N.

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