ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 14, Problem 32P
To determine
Create a custom-made dialog box for the power requirement to overcome air resistance for a car using VBA.
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14.11. As we explained in Chapter 7, the air resistance to 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. The air speed inside the tunnel is changed, and the drag force acting on the
car is measured. For a given car, the experimental data is generally represented by
a single coefficient that is called drag coefficient. It is defined by the following
relationship:
Fa
Cả
where
Ca = drag coefficient (unitless)
Fa = measured drag force (N or 1b)
p= air density (kg/m³ or slugs/ft')
V = air speed inside the wind tunnel (m/s or ft/s)
A = frontal area of the car (m? or ft')
The frontal area A represents the frontal projection of the car's area and could be
approximated simply by multiplying 0.85 times the width and the height of a
rectangle that outlines the front of a car. This is the area that you see when you
view the car from a direction normal to…
6.
a. Explain (include diagrams) the following components of Total drag on a solid object placed
in a moving fluid. Include in your discussion how these components vary as the orientation
of the object changes in the flow field:
i) Pressure Drag
ii) Friction Drag
b. An antenna in the shape of a cylindrical rod projects from the top of an automobile. If the
antenna is 106 cm long and 50 mm in diameter, calculate the drag force on it when the
automobile is travelling at a velocity of 7.5 m/s in still air at -20°C Assume the surface of
the structure is smooth.
Page 4 of 8
D = 2 Copv²A
%3D
Need help! Image attached.
A regulation tennis ball is made of an elastic material and can be modeled as a sphere.
The center of the tennis ball is hollow, filled with pressurized air. You may assume the mass of air inside the
tennis ball is negligible.
The elastic portion of the tennis ball has a mass of 58 grams [g].
The outer diameter is 2.6 inches (in] and elastic material has a thickness of 3 millimeters (mm).
What is the specific gravity of material used to form the tennis ball?
Chapter 14 Solutions
ENGINEERING FUNDAMENTALS
Ch. 14.2 - Prob. 1BYGCh. 14.2 - Prob. 2BYGCh. 14.2 - Prob. 3BYGCh. 14.2 - Prob. 4BYGCh. 14.2 - Prob. 5BYGCh. 14.2 - Prob. BYGVCh. 14.4 - Prob. 1BYGCh. 14.4 - Prob. 2BYGCh. 14.4 - Prob. 3BYGCh. 14.4 - Prob. 4BYG
Ch. 14.4 - Prob. 5BYGCh. 14.4 - Prob. BYGVCh. 14.5 - Prob. 1BYGCh. 14.5 - Prob. 2BYGCh. 14.5 - Prob. 3BYGCh. 14.5 - Prob. 4BYGCh. 14.5 - Prob. BYGVCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Using Excel, create a table that shows the...Ch. 14 - Using Excel, create a table that shows the...Ch. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - Prob. 12PCh. 14 - Prob. 13PCh. 14 - Prob. 14PCh. 14 - Prob. 15PCh. 14 - Prob. 16PCh. 14 - Prob. 17PCh. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 26PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - Prob. 33PCh. 14 - Prob. 34PCh. 14 - Prob. 35P
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