add force 3d unity code example

Example 1: how to make rb.addforce 2d

public Rigidbody rb; //make reference in Unity Inspector

public float SpeedX = 0.1f;
public float SpeedY = 0.5f;

rb.AddForce(new Vector2(SpeedX, SpeedY));

Example 2: rb.addforce c#

rb.AddForce(0, 0, 5 * Time.deltaTime);

// Time.deltaTime is optional ( Make sure that "T" is caps)