Why Character is going through the floor.

Why Character is going through the floor the floor has a BoxCollider2D and a Rigidbody2D with Kinematic setting and the player has the same thing but with Dynamic instead of Kinematic the code for the player

using UnityEngine;

public class PlayerMovement : MonoBehaviour {

 [SerializeField]
 KeyCode right;

 [SerializeField]
 KeyCode left;

 [SerializeField]
 Vector3 v3Force;    

 private void OnTriggerEnter2D(Collider2D other) {
     if (other.tag == "Ground") {
         GetComponent<Rigidbody2D>().velocity = v3Force;
     }
 }

 void Update()
 {   
 }

}