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2 cards from this section. Quick, good the night before a test.
What is drag force?
Consider what happens as an object moves in water or air.
How do you compute shear stress?
Remember the relationship between force and area in a fluid.
What does the Reynolds number indicate?
Think about its role in fluid dynamics.
True or False: Drag force is only affected by viscosity.
Consider other factors involved.
An automobile prototype has a drag coefficient of 0.35, a frontal area of 2.5 m², and tests show a velocity of 80 km/h in a wind tunnel. Calculate the drag force for the prototype in N.
Remember to convert velocity properly before plugging values into the drag force formula.
For dynamic similarity, a model scale is 1:10 with a velocity of 5 m/s. If you need to find the velocity of the full-scale object, what is it?
Think about how scaling affects velocity and ratio calculations.
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