How do we transform real time in normalized time?
1 The purpose
Finding the best (fairer) way of comparing the times of the timed training of all cyclists
Consider as variable the weight of the various bicycles. Several studies indicate that for every 1 (one) kg removed from the bicycle, the cyclist decreases 3 (three) minutes for each km of climb.
2 Science is used to help solve this problem
These are the surrounding forces: Force applied by cyclist (F), force of friction (Fa), weight of the bike on the ground bike (P) and normal reaction of the bike on the ground.
3 Going up and going down times
Applying Newton's second law of motion: F = m * a (vectorial), it is possible to show that the rise time and the descent time are respectively:
t=Δv/(F/M - g*(sin(α) + µ*cos(α))), for going up.
t=Δv/(F/M - g*(µ*cos(α)- sin(α))), for going down.
Δv/Δt in which Δv and Δt are the variation of speed and time. μ is the coefficient of friction (the dynamic is used because it is considered that there is movement during most of the time, α is the angle of inclination, M is the mass of the bike, and g the acceleration of gravity.
4 Example: Track shown below. 4 bikes cycled this track (9, 12, 15 e 18 kg)
According to the calculations described in Point 3, the sum of the times that a bike of 9, 12, 15 and 18 kg needs to travel all the way is:
9 kg, 3132.2 seconds,
12 kg, 4247.0 seconds,
15 kg, 5406,0 seconds
18 kg, 6615.3 seconds
5 So what can we do?
Use the ratio between the actual times of the respective bike User-cyclist and the actual time of the actual rider.
As new cyclists can enter during an event (1 month), the simulated time for one bike of 22 kg is majorated. In principle there are not lots of bikes in the market over 22 kg.
6 Then the following table is created and edited:
That is, the times are sorted by ascend order of the normalized times and not the real ones.