Question

A model of a submarine is built to determine the drag force acting on its prototype


A model of a submarine is built to determine the drag force acting on its prototype. The length scale is 1/100, and the test is run in water at 20° C, with a speed of 8 m/s. 

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Part A 

If the drag on the model is 25 N, determine the drag on the prototype if it runs in water at the same speed and temperature. This requires that the drag coefficient CD = 2FD/pV2L2 bethe same for both the model and the prototype. 

Express your answer to three significant figures and include the appropriate units. 

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