Acceleration and Max Speed on 2D Object

Basically I want to control the acceleration and max speed for an object.

The max speed should be constant for all objects of a type, but the acceleration should be different for objects with different masses.

Should I make a variable for acceleration per unit of mass ?

Here's what I've got so far, and it's working pretty well.

 public class PlayerController : MonoBehaviour {
 
     public float maxSpeed = 5f; // 5 m s^-1
     public float acceleration = 10f; // 10 m s^-2
 
     private Rigidbody2D rb2d;
 
     void Start()
     {
         rb2d = GetComponent<Rigidbody2D>();
     }
     
     void FixedUpdate()
     {
 
         if (rb2d.velocity.magnitude > maxSpeed)
             rb2d.velocity = rb2d.velocity.normalized * maxSpeed;
 
         float horizontal = Input.GetAxis("Horizontal") * acceleration * Time.deltaTime;
         float vertical   = Input.GetAxis("Vertical")   * acceleration * Time.deltaTime;
 
         rb2d.AddForce(new Vector2(horizontal, vertical), ForceMode2D.Impulse);
 
         print(rb2d.velocity.magnitude);
     }
 }