Rigidbody curve help needed

I USED rigidbody.addforce method

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class test : MonoBehaviour {
6.     void OnCollisionEnter(Collision other)
7.  {
8.  
9.       rigidbody.AddForce(0, 10, 0);
10.  
11.  }
12. }
13.  

but im not getting curve like object falling.it travels like angular force


but now i want to make the object move like a curve after collision.pls help me to do this.i have
attached image for reference.

 

Add a small force in the direction you want your ball to bounce... for example (0,10,2)

 

thanks .u helped me in short and sweet.