excinematique.py

Created on April 28, 2025

595 Bytes

Au cours d’un sprint sur 100m, 
on considere qu un sprinteur 
atteint sa vitesse maximale en
12m/s2 à 54m. On suppose qu il
decelere ensuite de façon constante
pour finir aux 100m a la vitesse
de 11m/s2.
Donner allure des courbes de vitesse
et acceleration en fonction de 
temps.

x-x0
100-54=46m
 
v-v0
11-12=-1m/s
 
Calculez acceleration produite 
entre 54 et 100m et le temps mis
pour parcourir cette phase
x-x0=vcarre -v0carre / 2*a
100-54=11carre-12carre / 2*a
46=121-144 / 2a
46= -23 / 2*a
A= -23 / 2*46
= -1 / 4
= -0,25m/s
 
-a = -1 / t
t = -1 / a
= -1 / 1 / -4
=4s

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