Error CS0120. Please Help

I’m getting this error-

Assets/Scripts/PlayerMovement.cs(17,27): error CS0120: An object reference is required to access non-static member `UnityEngine.Rigidbody.AddForce(UnityEngine.Vector3, UnityEngine.ForceMode)’

I’m new to making games so please help.This is my code-

using UnityEngine;
using System.Collections;

public class PlayerMovement : MonoBehaviour {
	public float moveSpeed;
	private float maxSpeed;
	private Vector3 input;
	// Use this for initialization
	void Start (){

	// Update is called once per frame
	void Update () {
		input = new Vector3(Input.GetAxis ("Horizontal"),Input.GetAxis ("Vertical"));
		Rigidbody.AddForce(input * moveSpeed);

It should be rigidbody.AddForce(input * moveSpeed); with a lower case R.

If the error message confuses you, let’s break down the error message to understand the jargon. Still, there is a lot of definitions to learn so don’t feel bad if you read the following but still feel confused :slight_smile:

An object reference is required...

Simplified, this means you need a variable. access non-static member...

Simplifed, a non-static member is a variable or function on a class, that isn’t static.

  • A static function requires no object to be called.
  • A non-static function requires an object to be called.

Then follow the signature of the function you were trying to call, which was illegal:

UnityEngine.Rigidbody.AddForce(UnityEngine.Vector3, UnityEngine.ForceMode)

Rigidbody.AddForce is a non-static function, which means you need an object (variable) to call it.

  • Rigidbody is a class.
  • rigidbody is a reference to an object.

Note: rigidbody component accessor is being phased out and is marked as obsolete. If you want to make your code future proof, consider using GetComponent<Rigidbody>() instead.