Swipe Wind

Hi guys I have a question,

I want to make a script that lets me swipe my finger in a direction and the object ( the little orange ball) will get a force or velocity in the direction you swipe but also the strengt of the swipe. So if the swipe is short you will get a little bit force or the swipe is big your force will be greater.

I want to use this on the Iphone so a script with touch Is possible. Only curruntly I am not behind a mac computer so I cannot test it. So if the script can be test with the mouse input that would be great.

I use this script to calculate the swipe grapghic.

 var targetPoint : Vector3;
 
 function Update () {
 
 if (Input.GetMouseButton(0)){
 
 var playerPlane = new Plane(Vector3.forward, transform.position);
 
 var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
       
 var hitdist = 0.0; 
      
 if (playerPlane.Raycast (ray, hitdist)) {
      
 targetPoint = ray.GetPoint(hitdist);
 
 transform.position = targetPoint;
     
 }
 
 }
 
 }

I want to use physics so I can bounce of walls.

I have really no clue where to start. I searched the internet for soltions but there was no one post that could help me. Maybe I did mis some posts if is that the cause I hope you can redirect me to that post.

Thanks in advance.

Dennis Jongmans