Time for action – adding an impulse force to a rigidbody component

Force can be applied to any GameObject variable that has a rigidbody component using Unity's AddForce function. In the case of our cannonballs, we want to add force to them as soon as they're instantiated; so in this section, we'll be editing our FireCannon function to include an additional force on any new cannonballs.

To change the properties of an instantiated prefab, we need a variable linked to it. Fortunately, Unity's Instantiate function returns the instantiated prefab, so we can store that in a new local variable in our FireCannon function. Perform the following steps to add an impulse:

1. Modify the call to Instantiate in your FireCannon function to store the return value in a new GameObject:

   void FireCannon()
   {
     Vector3 cannonballPos = gameObject.transform.position;
     cannonballPos.x += 2;
     cannonballPos.y += 2;
   
     GameObject newCannonball = (GameObject)Instantiate(cannonballPrefab, cannonballPos, Quaternion.identity...