rigidbody velocity c# unity

Vector3 velocity = new Vector3(10f/*x*/, 10f/*y*/, 10f/*z*/);
GetComponent<Rigidbody>().velocity = velocity;

//for rigidbody2D
GetComponent<Rigidbody2D>().velocity =new Vector2(40,0);

rb.velocity = new Vector3(0, 10, 0);