from vetorial import *

class Partic:
    "Uma particula no plano"

    def __init__(self,m=1,pos=Vetor(0,0),vel=Vetor(0,0)):
        self.m=m
        self.pos=pos
        self.vel=vel

    def mover(self,dt=0):
        self.vel+=self.forc()*dt/self.m
        self.pos+=self.vel*dt

    def forc(self):
        g=Vetor(0,-9.81)
        b=0.1
        return g*self.m-self.vel*b