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SOLUTIONS MANUAL
TO ACCOMPANY
An Introduction to Mechanical Engineering Fourth Edition
JONATHAN WICKERT
KEMPER LEWIS 1 / 4
1 © 2017 Cengage Learning®. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Chapter 2 Solutions There is no soulation manual for Cahpter 1 2 / 4
Chapter 2: Mechanical Design
2 © 2017 Cengage Learning®. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.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)
3 / 4
Chapter 2: Mechanical Design
3 © 2017 Cengage Learning®. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.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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