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3.5 2.5 1.5 0.5 8 10 Model velocity, ft/s Problem Statement: A sphere moving in a fluid experiences a drag force that is known to be a function of the sphere diameter, velocity, density, and viscosity. You performed some lab tests on a 3 inch diameter sphere using a water tunnel. The figure below indicates the results of your model test. For the tests the viscosity of the water was 2.34 10sifi2 and the water density was 1.94slugslfi3. Based on your lab results, estimate the drag on a 21fi diameter balloon moving through air at a velocity of 0.75ftls.Assume air to have a viscosity of 3.74 10 tb +slf2 and a density of 0,00238slugs Answer tolerance-10% for V. and 25% for F, hag. Be sure to include units. Your answers: Vm5.54 ft/s drag0.3122 Ib
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