Solution Manual for An Introduction to Mechanical Engineering, 3rd Edition

Name: Solution Manual for An Introduction to Mechanical Engineering, 3rd Edition
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Author: Nathan Bell

Prepare better with Solution Manual for An Introduction to Mechanical Engineering, 3rd Edition, a solutions manual that breaks down complex textbook problems.

Nathan Bell

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An ’s Solutions Manual to Accompany
AN INTRODUCTION TO MECHANICAL
ENGINEERING, 3RD EDITION
JONATHAN WICKERT
KEMPER LEWIS

Table of Contents
Preface………………………………………………………………………………………………………..vi
Chapter 2 ......................................................................................................... 1
Chapter 3 ....................................................................................................... 15
Chapter 4 ....................................................................................................... 55
Chapter 5 ....................................................................................................... 97
Chapter 6 ..................................................................................................... 139
Chapter 7 ..................................................................................................... 191
Chapter 8 ..................................................................................................... 227

Chapter 2: Mechanical Design
2
Problem P2.1: Give three examples of engineered products that must be circular in shape
and explain why. Any ball is not allowed as an answer!
Examples include:
⋅ DVD’s
⋅ CD’s
⋅ manhole covers
⋅ railroad advance warning signs
⋅ wheel (for flat roads)
⋅ axles
⋅ bullet cross-section (balanced for stable flight)
⋅ European speed limit sign
⋅ any shape with minimized arc length/surface area for given area/volume
⋅ optimized pressure vessel cross sections
⋅ US coin
⋅ lens (part of circle)
⋅ optimal nozzle/diffuser (no edge effects)
⋅ optimal capillary tube
⋅ optimal suction cup
⋅ traffic circle
⋅ thrown pot (on potting wheel)

Chapter 2: Mechanical Design
3
Problem P2.2: Give three examples of engineered products that must be triangular in shape
and explain why.
Examples include:
⋅ yield signs
⋅ the triangle instrument
⋅ billiards rack
⋅ knife blade (cross-section)
⋅ supports for finishing wood (pyramids or cones, must come to a point)
⋅ splitting wedge
⋅ handicap ramp viewed from side (to meet code)
⋅ three equally spaced instances per rotation cam
⋅ 30°-60°-90° or 45°-45°-90° drafting triangle
⋅ one of six identical pieces that can be assembled into a hexagon
⋅ chisel point

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Chapter 2: Mechanical Design
6
Problem P2.5: Give three examples of engineered products that must be black in color.
Examples include
⋅ Background for one way signs and night speed limit signs
⋅ theater bins/supports (disappears in dark)
⋅ stealth fighter (better “bounce” characteristics)
⋅ ninja suit (stealth at night)
⋅ black paint
⋅ black ink
⋅ backing for solar water heating
⋅ negative electric cables

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Chapter 2: Mechanical Design
8
Problem P2.7: Give three examples of engineered products that have a specific minimum
weight, but no specified maximum weight and specify the approximate minimum
weight.
Examples include:
⋅ Helium balloon holder (minimum weight will depend upon how many helium
balloons are being held)
⋅ non-wedge based door stop (minimum weight based on friction coefficient)
⋅ racecar (minimum weight based on racing regulations)
⋅ competition bike (minimum weight based on racing regulations)

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Chapter 2: Mechanical Design
10
Problem P2.9: Give three examples of engineered products that fulfill their designed
purpose by failing or breaking.
Examples include:
⋅ saw stop mechanism (http://www.sawstop.com/)
⋅ crumple zone in car
⋅ bumper (foam insert) in car
⋅ bike helmet
⋅ frangible bullets (split up when they hit anything other than flesh) to protect
bystanders
⋅ stress indicating paint has fluorescent dyes capsules that split under known
deflections
(http://www.newscientist.com/blog/invention/2007/10/stress-sensitive-paint.html)
⋅ Some meds are packaged in glass bottles that you break to open
⋅ Cover on a “pit trap” breaks when weight is applied
⋅ Fire suppression sprinkler detection device (solder connect melts or glass connection
shatters)

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Chapter 2: Mechanical Design
12
Problem P2.11: List three products that can be used equally well by people with and
without visual impairments and explain why.
Examples include:
⋅ Silverware
⋅ Chairs
⋅ Drinking Cups
⋅ Headphones
⋅ Bed
⋅ Drawers
⋅ Emergency response necklace (one button, worn around neck to locate)
http://inventorspot.com/articles/one_touch_911_dialer_calls_help_you_30719
⋅ Sight and sound cross walk guides
⋅ Fire alarm (day to day use, not installation and maintenance)
⋅ Automatic doors (and other motion detectors)

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Chapter 2: Mechanical Design
13
Problem P2.27: For the magnesium camera body shown, provide an explanation for which
processes you think were used in its manufacture and why.
This was most likely manufactured using a die cast procedure because of the material and
geometric detail in the pieces including a number of inclusions. Certain features could have
been machined, and some polishing/grinding operations may have been used.

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