FUNDAMENTALS OF FLUID MECHANICS
8th Edition
ISBN: 9781119571490
Author: GERHART
Publisher: WILEY
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Question
Chapter 9.1, Problem 4P
To determine
The drag force on the plate.
The lift force on the plate.
The drag force on the plate when shear stress is neglected.
The lift force on the plate when shear stress is neglected.
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A crate weighs 530 lb and is hung by three ropes attached to
a steel ring at A such that the top surface is parallel to the
xy plane. Point A is located at a height of h = 42 in above
the top of the crate directly over the geometric center of the
top surface. Use the dimensions given in the table below to
determine the tension in each of the three ropes.
2013 Michael Swanbom
cc00
BY NC SA
↑ Z
C
b
B
У
a
D
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
30 in
b
43 in
4.5 in
The tension in rope AB is 383
x lb
The tension in rope AC is 156
x lb
The tension in rope AD is 156
x lb
A block of mass m hangs from the end of bar AB that is 7.2
meters long and connected to the wall in the xz plane. The
bar is supported at A by a ball joint such that it carries only a
compressive force along its axis. The bar is supported at end
B by cables BD and BC that connect to the xz plane at
points C and D respectively with coordinates given in the
figure. Cable BD is elastic and can be modeled as a linear
spring with a spring constant k = 400 N/m and unstretched
length of 6.34 meters.
Determine the mass m, the compressive force in beam AB
and the tension force in cable BC.
Z
C
D
(c, 0, d)
(a, 0, b)
A
B
y
f
m
cc 10
BY
NC SA
2016 Eric Davishahl
x
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
8.1 m
b
3.3 m
с
2.7 m
d
3.9 m
e
2 m
f
5.4 m
The mass of the block is 68.8
The compressive force in bar AB is
364
× kg.
× N.
The tension in cable BC is 393
× N.
Chapter 9 Solutions
FUNDAMENTALS OF FLUID MECHANICS
Ch. 9.1 - Prob. 1PCh. 9.1 - Assume that water flowing past the equilateral...Ch. 9.1 - Repeat Problem 9.1 if the object is a cone (made...Ch. 9.1 - Prob. 4PCh. 9.1 - Prob. 5PCh. 9.1 - Prob. 6PCh. 9.1 - Prob. 8PCh. 9.1 - Typical values of the Reynolds number for various...Ch. 9.1 - Prob. 11PCh. 9.1 - Consider the following cases. (a) A small...
Ch. 9.2 - Water flows past a flat plate that is oriented...Ch. 9.2 - A viscous fluid flows past a flat plate such that...Ch. 9.2 - Prob. 15PCh. 9.2 - Prob. 16PCh. 9.2 - Prob. 17PCh. 9.2 - Prob. 18PCh. 9.2 - Air enters a square duct through a 1-ft opening as...Ch. 9.2 - A smooth, flat plate of length and width b = 4 m...Ch. 9.2 - An atmospheric boundary layer is formed when the...Ch. 9.2 - Prob. 22PCh. 9.2 - Prob. 23PCh. 9.2 - Prob. 25PCh. 9.2 - Prob. 26PCh. 9.2 - Prob. 27PCh. 9.2 - Prob. 28PCh. 9.2 - Prob. 29PCh. 9.2 - Prob. 30PCh. 9.2 - A laminar boundary layer velocity profile is...Ch. 9.2 - Prob. 32PCh. 9.2 - Prob. 33PCh. 9.3 - Should a canoe paddle be made rough to get a...Ch. 9.3 - Prob. 35PCh. 9.3 - Prob. 36PCh. 9.3 - Prob. 37PCh. 9.3 - Prob. 38PCh. 9.3 - Prob. 39PCh. 9.3 - Prob. 40PCh. 9.3 - Prob. 41PCh. 9.3 - Prob. 42PCh. 9.3 - Prob. 43PCh. 9.3 - Prob. 44PCh. 9.3 - Prob. 45PCh. 9.3 - Prob. 46PCh. 9.3 - Prob. 47PCh. 9.3 - Prob. 48PCh. 9.3 - Prob. 49PCh. 9.3 - Prob. 50PCh. 9.3 - Prob. 51PCh. 9.3 - Prob. 52PCh. 9.3 - Prob. 53PCh. 9.3 - Prob. 54PCh. 9.3 - Prob. 55PCh. 9.3 - Prob. 56PCh. 9.3 - A 38.1-mm-diameter, 0.0245-N table tennis ball is...Ch. 9.3 - Prob. 58PCh. 9.3 - Prob. 59PCh. 9.3 - Prob. 60PCh. 9.3 - Prob. 61PCh. 9.3 - Prob. 62PCh. 9.3 - Prob. 63PCh. 9.3 - Prob. 64PCh. 9.3 - Prob. 65PCh. 9.3 - Prob. 66PCh. 9.3 - During a flash flood, water rushes over a road as...Ch. 9.3 - Prob. 68PCh. 9.3 - Prob. 69PCh. 9.3 - Prob. 70PCh. 9.3 - Prob. 71PCh. 9.3 - Prob. 72PCh. 9.3 - Phil’s Pizza Parlor decides to place a thin,...Ch. 9.3 - Prob. 74PCh. 9.3 - Prob. 75PCh. 9.3 - Estimate the energy required for an average person...Ch. 9.3 - a vertical wind tunnel can be used for skydiving...Ch. 9.3 - Compare the rise velocity of an -in.-diameter air...Ch. 9.3 - A 50-lb box shaped like a 1-ft cube falls from the...Ch. 9.3 - A 500-N cube of specific gravity SG = 1.8 falls...Ch. 9.3 - The helium-filled balloon shown in Fig P9.81 is to...Ch. 9.3 - A 0.30-m-diameter cork ball (SG = 0.21) is tied to...Ch. 9.3 - A shortwave radio antenna is constructed from...Ch. 9.3 - Prob. 84PCh. 9.3 - Prob. 85PCh. 9.3 - Prob. 86PCh. 9.3 - Prob. 87PCh. 9.3 - Prob. 88PCh. 9.3 - A smooth orange ball weighs lb (at sea level) and...Ch. 9.3 - Prob. 90PCh. 9.3 - A marine location marker is a smoke-producing...Ch. 9.3 - Prob. 92PCh. 9.3 - An airplane flies at 150 km/hr. (a) The airplane...Ch. 9.3 - Prob. 94PCh. 9.3 - Prob. 96PCh. 9.3 - Prob. 97PCh. 9.3 - Prob. 98PCh. 9.3 - Prob. 99PCh. 9.4 - Prob. 100PCh. 9.4 - Prob. 101PCh. 9.4 - Prob. 102PCh. 9.4 - Prob. 103PCh. 9.4 - Prob. 104PCh. 9.4 - Prob. 105PCh. 9.4 - Prob. 106PCh. 9.4 - Prob. 107PCh. 9.4 - Prob. 108PCh. 9.4 - Prob. 109PCh. 9.4 - Prob. 111PCh. 9.4 - Prob. 112PCh. 9.4 - Prob. 113PCh. 9.4 - Prob. 114PCh. 9.4 - Prob. 115PCh. 9.4 - Prob. 116PCh. 9.4 - Prob. 117PCh. 9.4 - Prob. 118PCh. 9.4 - Prob. 119PCh. 9.4 - Prob. 120PCh. 9.4 - Prob. 121PCh. 9.4 - Prob. 122PCh. 9.4 - (See The Wide World of Fluids article “Why...Ch. 9.5 - Prob. 1LLPCh. 9.5 - Prob. 2LLPCh. 9.5 - We have seen in this chapter that streamlining an...
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