gistfile1.txt

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

public class ForceFriction : MonoBehaviour
{
    [SerializeField] private BoxCollider _boxCollider;
    [SerializeField] private Rigidbody _rigidbody;

    [SerializeField] private Vector3 _overlapSize = new Vector3(0.2f, 0.2f, 0);

    [SerializeField] private LayerMask _GroundOnly;

    [SerializeField] private float _weight;
    [SerializeField] private float _normalForce;
    [SerializeField] private float _staticFriction;
    [SerializeField] private float _kinematicFriction;
    [SerializeField] private float _acceleration;
    [SerializeField] private float _force;

    private void Update()
    {
        
        if (CheckIsOnGrounded())
        {
            _weight = _rigidbody.mass * Physics.gravity.y;
            _normalForce = _weight;

            _kinematicFriction = _boxCollider.material.dynamicFriction * _normalForce;
            _staticFriction = _boxCollider.material.staticFriction * _normalForce;

            _acceleration = _force / _rigidbody.mass;

        }      
    }

    private void FixedUpdate()
    {
        if (Input.GetKey(KeyCode.Space))
        {
            Move();
            print("Force" + _rigidbody.GetAccumulatedForce());
        }
    }

    private void Move()
    {
        _rigidbody.AddForce(Vector3.right * _force);
    }

    private bool CheckIsOnGrounded()
    {
        Collider[] _collider = Physics.OverlapBox(new Vector3(transform.position.x, transform.position.y + _boxCollider.center.y - 1, transform.position.z), _overlapSize, Quaternion.identity, _GroundOnly);

        for (int i = 0; i < _collider.Length; i++)
        {
            if (_collider != null) return true;       
        }
        return false;

    }

    private void OnDrawGizmos()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawCube(new Vector3(transform.position.x, transform.position.y + _boxCollider.center.y - 1, transform.position.z), _overlapSize / 2);
    }
}