unity 2d roll a ball using accelerometer

// Roll a ball with accelerometer
public float sensitivity = 1.0f; // how sensitive is the accelerometer

void Update()
{
  // float moveVertical = Input.GetAxis("Vertical"); // for keyboard
  float moveHorizontal = Input.acceleration.x; // for accelerometer

  Vector3 movement = new Vector3(moveHorizontal, 0.0f, 0.0f);

  rb.AddForce(movement * sensitivity); // speed
}