td4ex1segmentcorporeletcentredemasse.py

Created by math-pana72

Created on April 26, 2025

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Exercice 1 (résultats de l’exercice 3 du TD3).
Les vitesses de l’avant-bras aux 
articulations proximale (C) et 
distale (P) et au centre de masse
(G2) sont représentées sur la figure 
1. Où sont situés les centres de 
rotation instantanées I10 et I21 ? 
Construire le centre de rotation
instantanée I20. Calculer la 
vitesse de rotation du segment 2.
2. L’équiprojectivité sur le segment 
corporel est-elle vérifiée ?

reponse
1) 0=01+02
=1+1=2rad/s

0=Vc/I20c=Gg2/I20G2=Vp/I20P
 =0,5/0,25=2rad/s
 
I20Ccarre=I20carre+Ccarre
         =0,2carre+0,15carre
         =0,0625
         =racine0,0625=0,25
         
2) oui

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