title: The Racing Bicycle: Design, Function, Speed
author: Richard Moore
description: ". . . for those with even an amateur interest, the title is worth a look as its <b>century-plus survey</b> of speed and beauty offers <b>valuable takeaways</b>."<br />-<i>INTERIOR DESIGN MAGAZINE</i><br /><br />"We suggest picking up a copy of [<i>The Racing Bicycle</i>]. . .The machines featured in the volumehave become <b>cult objects taken as seriously as motorcycles</b>, with much the same degree of design and craftsmanship involved in their creation.<i></i>Moore and Benson spotlight the <b>50 greatest racing bike brands with sections focusing on signature details, technological advances and historical development</b>."<br />-<i>UrbanDaddy.com</i>
zlib_text: Chapter 4 
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  Page 1 
  CHAPTER 4 - Dynamics: Newton’s Laws of Motion 
   
  1. 
  We convert the units: 
   
   
  # lb = (0.25 lb)(4.45 N/lb) ˜ 1 N. 
   
  2. 
  If we select the bike and rider as the object, we apply Newton’s second law to find the mass: 
   
   
  ?F = ma;   
   
   
  255 N = m(2.20 m/s2), which gives       m = 116 kg. 
   
  3. 
  We apply Newton’s second law to the object: 
   
   
  ?F = ma;   
   
   
  F = (7.0 × 10–3 kg)(10,000)(9.80 m/s2) =       6.9 × 102 N. 
   
  4. 
  Without friction, the only horizontal force is the tension.  We apply Newton’s second law to the car: 
   
   
  ?F = ma;   
   
   
  FT = (1250 kg)(1.30 m/s2) =       1.63 × 103 N. 
   
  5. 
  We find the weight from the value of g. 
   
  (a) Earth: FG = mg = (58 kg)(9.80 m/s2) =       5.7 × 102 N. 
   
  (b) Moon: FG = mg = (58 kg)(1.7 m/s2) =       99 N. 
   
  (c) Mars: 
  FG = mg = (58 kg)(3.7 m/s2) =       2.1 × 102 N. 
   
  (d) Space: FG = mg = (58 kg)(0 m/s2) =       0. 
   
  6. 
  The acceleration can be found from the car’s one-dimensional motion: 
   
   
  v = v0 + at;    