Unable to access rigidbody2d.Velocity?

Hi Unity,

Can I know why I am not able to use rigidbody2d.Velocity or rigidbody2d.AddForce?
I am using Unity5. I learn from the Unity2d tutorial about player controller and having this problem in my script.

43842-capture.png

private Rigidbody2D rigi;
private void Awake()
{
rigi = GetComponent();
}
void Update()
{
//blablabla
rigi.AddForce(new Vector2(0,700f));
//blablabla
rigi.velocity = new Vector2(1f, 2f);
//blablabla
}

Use

GetComponent&ltRigidbody2D&gt()

instead of

rigidbody2d

@DoTA_KAMIKADzE Hey, hope I dont break some necromancing rules but I would appriciate your help. I tried piecing lines of codes together from various tutorials to get it working it still floats after I stop pressing the button which should be the problem here but I cant rely figurate out what to do or what to replace to fix it

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour 
{

    public float speed;             //Floating point variable to store the player's movement speed.

    private Rigidbody2D rb2d;       //Store a reference to the Rigidbody2D component required to use 2D Physics.

    // Use this for initialization
    void Start()
    {
        //Get and store a reference to the Rigidbody2D component so that we can access it.
        rb2d = GetComponent<Rigidbody2D> ();
    }

    //FixedUpdate is called at a fixed interval and is independent of frame rate. Put physics code here.
    void FixedUpdate()
    {
        //Store the current horizontal input in the float moveHorizontal.
        float moveHorizontal = Input.GetAxis ("Horizontal");

        //Store the current vertical input in the float moveVertical.
        float moveVertical = Input.GetAxis ("Vertical");

        //Use the two store floats to create a new Vector2 variable movement.
        Vector2 movement = new Vector2 (moveHorizontal, moveVertical);

        //Call the AddForce function of our Rigidbody2D rb2d supplying movement multiplied by speed to move our player.
        rb2d.AddForce (movement * speed);
    }
}