function f2=Weg(m,Fa,d,x,rho,cw,A,dT,v)
N=10000;
for i=1:N

    x(i+1)=x(i)+1/m(Fa-d*v(i)-rho/2*cw*A*(v(i))^2)*dT
    
end
  f2=x
end