rigidbody2d settins unity code example

Example 1: rigidbody2d unfreeze position

public Rigidbody2D rb;

void Start()
{
	rb.constraints = RigidbodyConstraints2D.None;
}

Example 2: unity how to set rigidbody velocity

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