tghthth.py

Created by aksil69140

Created on March 12, 2023

953 Bytes


Une chronophotographie montre les diffrentes positions dun ballon,modelise
toutes les 0,010 secondes
Representer le vecteur vitesse du point B a la position 3 en prenant lechelle
1.0cm = 1.5ms-1
echelle en bas 1.0 5.0
vi mimi+1/t
direction horizontale
sens gauche vers la droite
norme longueur l origineboutvite
calculer 
oncherche b3 ON MESURE B3B4
SA FAIT 1.5CM D/T
TU DIVISE LT
TABLEAU EN CROI
schema gauche realite droite
1.0cm           5.0cm
1.5 =7.5   1.5*5.0/1=7.5
premiere ligne echelle distance donne enonce
1cm schema corrrespond a 5.0 cm realite
en bas valeur mesure regle chronophotographie
si on veut mettre par senconde il faut convertir cm par m
7.5cm*10-2
calculer valeur vitesse etudier
distance b3b4/duretemp 0.010 s
7.5ms-1
en deduire longuer segment fleche
schema      realite
premiere ligne vitesse
deuxieme ligne longuer 7.5
1.0       1.5 ms-1
          7.5ms-1
5.0cm
trav=cer v3 5.0 cm vers b4
km hm dam m dm cm mm

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