How do you get this answer? important that engineers investigate. As you mayalso know, the drag force acting on a car is determinedexperimentally by placing the car in a wind tunnel. Fora given car, the experimental data is generally representedby a single coefficient that is called the dragcoefficient. It is given by the following relationship:FdCd=-whereCd _ drag coefficientFd _ measured drag force (lb)r_ air density (slugs /ft3)V_ air speed inside the wind tunnel (ft /s)A_ frontal area of the car (ft2)What is the appropriate unit for Cd if the precedingequation is to be homogeneous in units? Show all stepsof your work.lblbpound ftAsk Epound x () x ft²A+You can

Answered: important that engineers investigate.…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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How do you get this answer?

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 following relationship:
Fd
Cd=-
where
Cd _ drag coefficient
Fd _ measured drag force (lb)
r_ air density (slugs /ft3)
V_ air speed inside the wind tunnel (ft /s)
A_ frontal area of the car (ft2)
What is the appropriate unit for Cd if the preceding
equation is to be homogeneous in units? Show all steps
of your work.
lb
lb
pound ft
Ask E
pound x () x ft²
A+
You can

Expert Solution

Step 1

GIVEN:

$C_{d} = D r a g c o e f f i c i e n t F_{d} = M e a s u r e d d r a g f o r c e (l b) ρ = A i r d e n s i t y (s l u g / f t^{3}) V = A i r s p e e d (f t / s) A = P r o j e c t e d a r e a (f t^{2})$

Also;

$C_{d} = \frac{F_{d}}{\frac{1}{2} \times ρ V^{2} A}$

TO FIND;

The units of $C_{d}$

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