How can I stop the velocity of an object in movement when I touch it?

I´m not an expert on swipe controllers, so I decided to find a tutorial on internet. It also worked, but I need to change the player velocity to 0 when i touch it while is moving, I consider that needs a double conditional, but i don´t know how to use it. I hope that someone can help me with that problem.

there is the script example:

public class SwipeScript2 : MonoBehaviour {

 Vector2 startPos, endPos, direction;
 Rigidbody2D myRigidbody2D;
 public float shootPower = 10f;

 void Start()
 {
     myRigidbody2D = GetComponent<Rigidbody2D>();
 }

 void OnMouseDown()
 {
     if (Input.GetMouseButtonDown(0))
     {
         startPos = Input.mousePosition;
     }
 }

 void OnMouseUp()
 {
     if (Input.GetMouseButtonUp(0))
     {
         endPos = Input.mousePosition;
         direction =startPos - endPos;
         myRigidbody2D.isKinematic = false;
         myRigidbody2D.AddForce(-direction * shootPower);
     }
     else
     {
         myRigidbody2D.AddForce(new Vector2(0, 0));
     }
 }

}