Doing a kick on a rigidbody

I want todo do a kick or its actually a flick since its a flick with the finger on IOS.

It sounds easy "Just add some force" but I dont want the physics to go wild and everything to bounce everywhere. So basically I should add force and remove it again after some time, what about objects it hits?

 

The nice thing about force is that it is applied instantly. All you need is a function that's only called once.

In this example, a forward force is applied to the target rigidbody when the user taps the screen. I'm not familiar enough with touch input to get a flick, though.

Code (csharp):

1.  
2. var kickStrength = 500.0;
3.  
4. function Update(){
5.     for (var i = 0; i < Input.touchCount; ++i) {
6.         if (Input.GetTouch(i).phase == TouchPhase.Began) {
7.             Kick();
8.         }
9.     }
10. }
11.  
12. function Kick(){
13.     rigidbody.AddRelativeForce (Vector3.forward * kickStrength));
14. }
15.