Slowing speed of particle\circle when using vectors

I went through the vectors tutorial on the open frameworks tutorial page and did some experiment .
With the code i wrote ,i found out that the circle slows down as it reaches it destination,like its de-accelerating .Why is it de-accelerating even though i did not write any code for it ?
Here is the code:

#include "testApp.h"

ofVec2f V1(500,500);
ofVec2f V2(500,500);
ofVec2f V3(2,2);

void testApp::draw(){

ofEnableSmoothing();


ofSetColor(0, 0, 0);
ofFill();

ofCircle(V1[0], V1[1], 10);

if(V1[0] < 3 && V1[1] < 3)
{
    V1 = V2;
}
else
{
    V1 = V1 + (0.009)*(V3 - V1);
}

ofSetColor(0, 0, 0);
ofFill();
ofCircle(144, 900, 10);

}

looks like easing

ohh yeah ,silly me ,thanks :smile: