The air resistance to the motion of a vehicle is something important that engineers investigate. As you may also know, the drag force acting on a car is determined experimentally by placing the car in a wind tunnel. For a given car, the experimental data is generally represented by a single coefficient that is called the drag coefficient. It is given by the relationship: Fa C, = where C, = drag coefficient F, = measured drag force (Ib) p = air density (slugs/ft') V = air speed inside the wind tunnel (ft/s) A = frontal area of the car (ft²) What is the appropriate unit for C, if the preceding equation is to be homogeneous in units? Show all steps of your work.
The air resistance to the motion of a vehicle is something important that engineers investigate. As you may also know, the drag force acting on a car is determined experimentally by placing the car in a wind tunnel. For a given car, the experimental data is generally represented by a single coefficient that is called the drag coefficient. It is given by the relationship: Fa C, = where C, = drag coefficient F, = measured drag force (Ib) p = air density (slugs/ft') V = air speed inside the wind tunnel (ft/s) A = frontal area of the car (ft²) What is the appropriate unit for C, if the preceding equation is to be homogeneous in units? Show all steps of your work.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The air resistance to the motion of a vehicle
is something important that engineers
investigate. As you may also know, the
drag force acting on a car is determined
experimentally by placing the car in a wind
tunnel. For a given car, the experimental
data is generally represented by a single
coefficient that is called the drag coefficient.
It is given by the relationship:
Fa
C, =
where
C, = drag coefficient
F, = measured drag force (Ib)
p = air density (slugs/ft')
V = air speed inside the wind tunnel (ft/s)
A = frontal area of the car (ft²)
What is the appropriate unit for C, if the
preceding equation is to be homogeneous in
units? Show all steps of your work.
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