GetComponent usage
public class startingForce : MonoBehaviour { public float yval; Rigidbody thisRigidBody; // Start is called before the first frame update void Start() { thisRigidBody = GetComponent<Rigidbody>(); thisRigidBody.AddRelativeForce(0,yval,0); } // Update is called once per frame void Update() { } } Like this! ^ here we use GetComponent to look for the Rigidbody component attached to the same GameObject Note the use of < to surround > the component type and how it is followed by the ( ) <-something I keep forgetting. Also note how we make a variable of the same component type equal to it, so we can then refer to it.