Two bikes, different wheel diameter

  • Context: High School 
  • Thread starter Thread starter Chiomina
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SUMMARY

The discussion centers on whether two bicycles with different wheel diameters will achieve the same speed when ridden with the same effort. The consensus is that, under ideal conditions where all other factors are equal, both bikes will cover the same distance at the same time. Key factors affecting speed include wind resistance and rolling resistance, with wind resistance becoming dominant at higher speeds. The conclusion is that while larger wheels may have advantages in rolling resistance, the same effort will yield the same work done, resulting in equivalent speeds.

PREREQUISITES
  • Understanding of basic physics concepts such as force, work, and resistance
  • Familiarity with cycling dynamics, including rolling resistance and wind resistance
  • Knowledge of bicycle mechanics, particularly wheel size and gear ratios
  • Awareness of how environmental factors like terrain and wind affect cycling performance
NEXT STEPS
  • Research the impact of wheel diameter on rolling resistance in cycling
  • Explore the relationship between wind resistance and cycling speed at various velocities
  • Learn about gear ratios and their effect on cycling efficiency
  • Investigate the physics of drafting in cycling and its impact on performance
USEFUL FOR

Cyclists, bicycle mechanics, physics enthusiasts, and anyone interested in optimizing cycling performance through understanding the effects of wheel size and resistance factors.

  • #31
I think you will find that wind resistance at v^2 while the power to overcome it varies as v^3
 

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