Mecanim problem with setting speed

Hi I've had this problem for a while now and I still cant get it right, I hope someone can help. Is it possible to have my controller script on obj1 and my animation controller script on obj2?

And if so, how can the animation speed be controlled by obj1's movements?

Heres obj1 movement script

 public float speed = 210;
 public Vector3 tilt = Vector3.zero;

 void Start ()
 {
 }
 
 void FixedUpdate () 
 {
     tilt.x = -Input.acceleration.y + Input.GetAxis ("Horizontal");
     tilt.z = Input.acceleration.x + Input.GetAxis ("Vertical");
     
     rigidbody.AddForce(tilt * speed * Time.deltaTime);
     
 }

I dont know how to set a variable to equal the speed of the movement on this script, so I can feed that into anim.SetFloat() on obj2. Please help!