INSTRUCTOR’S SOLUTIONS MANUAL FOR
AN INTRODUCTION TO MECHANICAL ENGINEERING, ENHANCED EDITION, 4TH
EDITION BY JONATHAN WICKERT, KEMPER LEWIS
ALL CHAPTERS 1-8
Contents
Preƒace .............................................................................................................. v
Chapter 2 ........................................................................................................... 1
Chapter 3 ......................................................................................................... 19
Chapter 4 ......................................................................................................... 59
Chapter 5 ....................................................................................................... 104
Chapter 6 ....................................................................................................... 150
Chapter 7 ....................................................................................................... 210
Chapter 8 ....................................................................................................... 253
, Chapter 2: Mechanical Design
Chapter 2
Solutions
1
, Chapter 2: Mechanical Design
P2.1: Give three examples oƒ 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 (ƒor ƒlat roads)
· axles
· bullet cross-section (balanced ƒor stable ƒlight)
· European speed limit sign
· any shape with minimized arc length/surƒace area ƒor given area/volume
· optimized pressure vessel cross sections
· US coin
· lens (part oƒ circle)
· optimal nozzle/diƒƒuser (no edge eƒƒects)
· optimal capillary tube
· optimal suction cup
· traƒƒic circle
· thrown pot (on potting wheel)
2
, Chapter 2: Mechanical Design
P2.2: Give three examples oƒ engineered products that must be triangular in shape
and explain why.
Examples include:
· yield signs
· the triangle instrument
· billiards rack
· kniƒe blade (cross-section)
· supports ƒor ƒinishing wood (pyramids or cones, must come to a point)
· splitting wedge
· handicap ramp viewed ƒrom side (to meet code)
· three equally spaced instances per rotation cam
· 30°-60°-90° or 45°-45°-90° draƒting triangle
· one oƒ six identical pieces that can be assembled into a hexagon
· chisel point
3
AN INTRODUCTION TO MECHANICAL ENGINEERING, ENHANCED EDITION, 4TH
EDITION BY JONATHAN WICKERT, KEMPER LEWIS
ALL CHAPTERS 1-8
Contents
Preƒace .............................................................................................................. v
Chapter 2 ........................................................................................................... 1
Chapter 3 ......................................................................................................... 19
Chapter 4 ......................................................................................................... 59
Chapter 5 ....................................................................................................... 104
Chapter 6 ....................................................................................................... 150
Chapter 7 ....................................................................................................... 210
Chapter 8 ....................................................................................................... 253
, Chapter 2: Mechanical Design
Chapter 2
Solutions
1
, Chapter 2: Mechanical Design
P2.1: Give three examples oƒ 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 (ƒor ƒlat roads)
· axles
· bullet cross-section (balanced ƒor stable ƒlight)
· European speed limit sign
· any shape with minimized arc length/surƒace area ƒor given area/volume
· optimized pressure vessel cross sections
· US coin
· lens (part oƒ circle)
· optimal nozzle/diƒƒuser (no edge eƒƒects)
· optimal capillary tube
· optimal suction cup
· traƒƒic circle
· thrown pot (on potting wheel)
2
, Chapter 2: Mechanical Design
P2.2: Give three examples oƒ engineered products that must be triangular in shape
and explain why.
Examples include:
· yield signs
· the triangle instrument
· billiards rack
· kniƒe blade (cross-section)
· supports ƒor ƒinishing wood (pyramids or cones, must come to a point)
· splitting wedge
· handicap ramp viewed ƒrom side (to meet code)
· three equally spaced instances per rotation cam
· 30°-60°-90° or 45°-45°-90° draƒting triangle
· one oƒ six identical pieces that can be assembled into a hexagon
· chisel point
3
