Conveyor.cs

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

public class Conveyor : MonoBehaviour
{
public float speed;
public float visualSpeedScalar;

private Vector3 direction;
private float currentScroll;

private void Update()
	{
		currentScroll = currentScroll + Time.deltaTime*speed*visualSpeedScalar;
		GetComponent<Renderer>().material.mainTextureOffset = new Vector2(0, currentScroll);
	}

	private void OnCollisionStay(Collision otherThing)
	{
		direction = transform.forward;
		direction = direction*speed;

		otherThing.rigidbody.AddForce(direction, ForceMode.Acceleration);
	}
}