meca23.py

Created by acrozak02

Created on January 17, 2021

1.03 KB


# Type your text here
  mouvement dans un champ electrique 
verticale
(vect E vers le haut)
E(somme)(vect)F=m*(vect)a soit
q*(vect)E=m*(vect)a
donc vect a=q/m*(vect)E
le vect accelera est vertical,de meme sens que E
si la charge q est positive,et de sens contraire sinon.

coordonés cartesiens
vect a {ax=0 ay=q*E/m az=0
-----
+++++ vect E vers le haut
determiner vect vitesse
vect a{ax=0 ay=q*E/m az=0
primitive
vect v {vx=Cx vy=q*E/m*t+Cy vz=Cz
vect v0{vx0=v0*cos(alpha)=Cx
        vy0=v0*sin(alpha)=q*E/m*0+Cy
        vz0=0=Cz
il vient:{Cx=v0*cos(alpha)
          Cy=v0*sin(alpha)
          Cz=0
donc vect v{vx=vo*cos(alpha)
            vy=q*E/m*t+v0*sin(alpha)
            vz=0

vect v primitive 
vect OM{x=v0*cos(alpha)*t+Dx
        y=q*E/2m*t**2+v0*sin(alpha)*t+Dy
        z=Dz
vect OM0{x0=0=v0*cos(alpha)*0+Dx
         y0=0=q*E/2m*0**2+v0*sin(alpha)*0+Dy
         z0=0=Dz
il vient {Dx=0
          Dy=0
          Dz=0
donc coordonnée cartesiennes
de vect OM{x=v0*cos(alpha)*t
           y=q*E/2m*t**2+v0*sin(alpha)*t
           z=0

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