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What is the Effect of Various Road Surfaces in Beijing on the Deceleration of a Bike when the Brakes are Fully Applied?

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1. What is the Effect of Various Road Surfaces in Beijing on the Deceleration of a Bike when the Brakes are Fully Applied? 2. Description of the Experiment 3. Raw Data…
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  • 1. What is the Effect of Various Road Surfaces in Beijing on the Deceleration of a Bike when the Brakes are Fully Applied?
  • 2. Description of the Experiment
  • 3. Raw Data Surfaces Gravel Road Tile Road Grass Wet Road 1 2 3 1 2 3 1 2 3 1 2 3 1 Distance / ± 0.05 m 6.37 6.21 6.03 5.17 5.05 4.98 5.42 5.28 5.33 4.80 4.64 4.69 7.46 Time 1 / ± 0.1 s 7.43 14.40 9.03 5.97 15.20 17.50 6.75 5.93 5.56 4.75 5.03 4.87 9.68 Time 2 / ± 0.1 s 5.93 13.19 7.50 4.50 13.84 16.19 5.13 4.25 3.97 3.44 3.77 3.68 7.76 Velocity / ± 0.5 km/h 25 25 25 25 25 25 25 25 25 25 25 25 25
  • 4. Analysis of the Data Deceleration on Difference Surfaces (From Graph) Deceleration on Difference Surfaces (From Calculation) s = ut + ½ at 2 4.98 = (6.94)(17.50 – 16.19) + ½ (a)(17.50 – 16.19) 2 4.98 = (6.94)(1.31) + ½ (a)(1.31) 2 4.98 = 9.09 + (0.86)(a) (0.86)(a) = -4.11 a = -4.78 m/s/s Velocity vs Time of a Bike (on main road) Surface Gravel Road Tile Road Grass Wet Road Trial 1 3.672 4.829 4.481 4.948 2.913 Trial 2 3.803 4.811 4.467 4.922 NA Trial 3 4.015 4.841 4.444 4.967 NA Average 3.830 ± 0.170 4.827 ± 0.015 4.464 ± 0.018 4.987 ± 0.023 2.913 Surface Gravel Road Tile Road Grass Wet Road Trial 1 3.60 4.66 4.44 5.01 3.19 Trial 2 3.87 4.76 4.53 5.18 NA Trial 3 3.93 4.78 4.52 5.05 NA Average 3.80 ± 0.2 4.730±0.06 4.50 ± 0.04 5.08 ± 0.1 3.19
  • 5. Conclusion
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