An object reference is required for the non-static field, method, or property 'SceneManager.LoadScene(string)'

Question

I'm making a 2D platformer in Unity3D (you can only control along the X axis, and Y axis by jumping) and I'm trying to move to the next stage by loading the next scene.

I've tried looking all over stack overflow and other sites and I can't find anything to help. Here's my code:

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class SceneManager : MonoBehaviour
{
    public void LoadScene(string level)
    {
        SceneManager.LoadScene(level);
    }
}

public class Player : MonoBehaviour
{
    public Rigidbody rb;

    public float jumpForce = 10f;
    public float sidewaysForce = 10f;

    bool isGrounded = true;
    string myObjects = "";


    // Update is called once per frame
    void FixedUpdate()
    {
        if (Input.GetKey("d"))
        {
            rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }

        if (Input.GetKey("a"))
        {
            rb.AddForce((0 - sidewaysForce) * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }

        if ((Input.GetKeyDown("space")) && isGrounded)
        {
            rb.AddForce(0, jumpForce * Time.deltaTime, 0, ForceMode.VelocityChange);
        }


    }

    void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.CompareTag("Ground"))
        {
            isGrounded = true;
        }

        if (collision.gameObject.CompareTag("Death"))
        {
            transform.position = new Vector3(0, 4, 0);//(where you want to teleport)
        }

        if (collision.gameObject.CompareTag("NextT"))
        {
            SceneManager myObject = new SceneManager();
            myObject.LoadScene("Level1");
        }
    }

    void OnCollisionExit(Collision collision)
    {
        if (collision.gameObject.CompareTag("Ground"))
        {
            isGrounded = false;
        }
    }
}

The message is;

Assets\Player.cs(10,9): error CS0120: An object reference is required for the non-static field, method, or property 'SceneManager.LoadScene(string)'

and as it is a compiler error I can't start the game. By the way, I'm really new to C# so please overlook any inefficiencies in the code. :)