% Bouncing Ball
x = 0;
y = 2;
dx = 2;
dy = 3;
g = -9.8;
t = 0;
dt = 0.01;
Bounce = 0;
N = 0;
while(Bounce < 2)
   ddx = 0;
   ddy = g;
   dx = dx + ddx*dt;
   dy = dy + ddy*dt;
   t = t + dt;
   x = x + dx*dt;
   y = y + dy*dt;
   if(y<0) 
       dy = abs(dy);
       Bounce = Bounce + 1;
   end
   N = mod(N+1,5);
   if(N==0)
      plot(x,y,'ro');
      hold on
      xlim([0,10]);
      ylim([0,5]);
      pause(0.01);
   end
end