diff --git a/config/CarConfig.h b/config/CarConfig.h
index f268d0a..d5bde16 100644
--- a/config/CarConfig.h
+++ b/config/CarConfig.h
@@ -2,8 +2,8 @@
  * @brief This file contains all the constant values for the car class.
  *
  * @file CarConfig.h
- * @author Mateusz Krakowski
- * @date 2023-06-06
+ * @authors Mateusz Krakowski, Jakub Marcowski
+ * @date 2023-06-07
  */
 
 #ifndef CARCONFIG_H
@@ -11,15 +11,21 @@
 
 class CarConfig {
    public:
-
-       // Car speed is dependent on the car's torque
+    // Car speed is dependent on the car's torque
     static constexpr float CAR_TORQUE = 2000.0f;
-    
-     
+
     static constexpr float MAX_JOINT_LENGTH = 0.01f;
     // Number of vertices in a car's body polygon
     static constexpr int CAR_VERTICES = 8;
 
+    // F = V^2 * k
+    // k ≈ 1/2 * ρ * A * C_d ≈ 3.4
+    // ρ = 1.293 kg/m^3
+    // A = ? (let's assume 5 m^2)
+    // C_d = ? (let's assume 1.05)
+    //
+    // F = 3.4 * V^2
+    static constexpr float AIR_RES_FACTOR = 3.4f;
 };
 
 #endif  // CARCONFIG_H
diff --git a/config/Config.h b/config/Config.h
index ec216e5..f1c2546 100644
--- a/config/Config.h
+++ b/config/Config.h
@@ -3,7 +3,7 @@
  *
  * @file Config.h
  * @authors Jakub Marcowski, Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #ifndef CONFIG_H
@@ -16,7 +16,7 @@ class Config {
 
     // 60 for real time, 120 for fast forward - anything else is undefined behaviour
     static constexpr int MAX_FPS = 60;
-    
+
     static constexpr int GROUND_PARTS_RENDERED = 32;
 
     // Exporting to file
diff --git a/config/EvolutionaryAlgorithmConfig.h b/config/EvolutionaryAlgorithmConfig.h
index 145ea7f..8a45eef 100644
--- a/config/EvolutionaryAlgorithmConfig.h
+++ b/config/EvolutionaryAlgorithmConfig.h
@@ -3,7 +3,7 @@
  *
  * @file EvolutionaryAlgorithmConfig.h
  * @author Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #ifndef EVOLUTIONARY_ALGORITHM_CONFIG_H
@@ -12,9 +12,11 @@
 class EvolutionaryAlgorithmConfig {
    public:
     // Evolutionary algorithm parameters
-    static constexpr int POPULATION_SIZE = 15;
+
+    static constexpr int POPULATION_SIZE = 16;
 
     // Boundaries for the chromosomes
+
     static constexpr float MIN_BODY_LENGTH = 1.0f;
     static constexpr float MAX_BODY_LENGTH = 5.0f;
 
@@ -28,6 +30,7 @@ class EvolutionaryAlgorithmConfig {
     static constexpr float MAX_WHEEL_DENSITY = 1000.0f;
 
     // Population initialization hyper parameters
+
     static constexpr float INITIAL_BODY_LENGTH_MEAN = 3.0f;
     static constexpr float INITIAL_BODY_LENGTH_VARIANCE = 1.0f;
 
@@ -55,6 +58,7 @@ class EvolutionaryAlgorithmConfig {
     static constexpr float MUTATION_FACTOR_WHEEL_DENSITY = 20.0f;
 
     // Selection hyper parameters
+
     static constexpr int TOURNAMENT_SIZE = 3;  // Has to be equal to or lesser than POPULATION_SIZE
 };
 
diff --git a/config/MapGenConfig.h b/config/MapGenConfig.h
index 6342dae..88cc605 100644
--- a/config/MapGenConfig.h
+++ b/config/MapGenConfig.h
@@ -3,7 +3,7 @@
  *
  * @file MapGenConfig.h
  * @author Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #ifndef MAPGENCONFIG_H
@@ -22,10 +22,9 @@ class MapGenConfig {
     static constexpr float CAR_STARTING_Y = 650.0;
 
     // Change the mapgen behaviour here
+
     static constexpr float GROUND_DEGREE_DEVIATION = 12.0f;
     static constexpr float MAX_GROUND_DEGREE = 50.0f;
-
-
 };
 
 #endif  // MAPGENCONFIG_H
diff --git a/docs/docs_by_doxygen.pdf b/docs/docs_by_doxygen.pdf
index 4797e23..1ace08a 100644
Binary files a/docs/docs_by_doxygen.pdf and b/docs/docs_by_doxygen.pdf differ
diff --git a/src/Car.cc b/src/Car.cc
index c032214..0767a11 100644
--- a/src/Car.cc
+++ b/src/Car.cc
@@ -4,7 +4,7 @@
  *
  * @file Car.cc
  * @authors Jakub Marcowski, Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #include "Car.h"
@@ -97,13 +97,13 @@ std::vector<b2Vec2> createVertices(std::vector<float> lengths) {
 
     std::vector<float> angles;
     angles.reserve(lengths.size());
-    for (int i = 0; i < lengths.size(); i++) {
+    for (int i = 0; i < lengths.size(); ++i) {
         angles.push_back(360.0f / lengths.size());
     }
     // so that the wheels are set properly (that is - parallel to the ground)
     float angle = ((180.0f + (angles.back() / 2)) / 180.0f) * Config::PI;
 
-    for (int i = 0; i < lengths.size(); i++) {
+    for (int i = 0; i < lengths.size(); ++i) {
         vertices.emplace_back(lengths[i] * cos(angle), lengths[i] * sin(angle));
         angle += (angles[i] / 180.0f) * Config::PI;
     }
diff --git a/src/GUI.cc b/src/GUI.cc
index cf82eac..2fde11f 100644
--- a/src/GUI.cc
+++ b/src/GUI.cc
@@ -3,7 +3,7 @@
  *
  * @file GUI.cc
  * @author Jakub Marcowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #include "GUI.h"
@@ -14,9 +14,6 @@ void renderVelocityPlot(std::vector<Car>& cars, bool paused) {
     if (ImPlot::BeginPlot("Velocity")) {
         ImPlot::SetupLegend(ImPlotLocation_West, ImPlotLegendFlags_Outside);
         for (int i = 0; i < cars.size(); ++i) {
-            char i_str[11];  // 10 digits + null
-            sprintf(i_str, "%d", i);
-
             if (!paused) {
                 cars[i].getVelX()->push_back(cars[i].getVelX()->back() + 1);
                 cars[i].getVelY()->push_back(cars[i].getVelocity());
@@ -26,7 +23,7 @@ void renderVelocityPlot(std::vector<Car>& cars, bool paused) {
             std::vector<float> v_values_crop = std::vector<float>(
                 cars[i].getVelY()->end() - Config::VELOCITY_ARRAY_SIZE, cars[i].getVelY()->end());
             ImPlot::PushStyleColor(ImPlotCol_Line, SFMLColorToImVec4(cars[i].getBodyColor()));
-            ImPlot::PlotLine(i_str, &(v_axis_crop[0]), &(v_values_crop[0]),
+            ImPlot::PlotLine(std::to_string(i).c_str(), &(v_axis_crop[0]), &(v_values_crop[0]),
                              Config::VELOCITY_ARRAY_SIZE);
             ImPlot::PopStyleColor();
         }
@@ -41,9 +38,6 @@ void renderPositionPlot(std::vector<Car>& cars, bool paused) {
     if (ImPlot::BeginPlot("Position")) {
         ImPlot::SetupLegend(ImPlotLocation_West, ImPlotLegendFlags_Outside);
         for (int i = 0; i < cars.size(); ++i) {
-            char i_str[11];
-            sprintf(i_str, "%d", i);
-
             if (!paused) {
                 cars[i].getPosXVec()->push_back(cars[i].getPosXVec()->back() + 1);
                 cars[i].getPosYVec()->push_back(cars[i].getBody()->body->GetPosition().x);
@@ -55,7 +49,7 @@ void renderPositionPlot(std::vector<Car>& cars, bool paused) {
                 std::vector<float>(cars[i].getPosYVec()->end() - Config::VELOCITY_ARRAY_SIZE,
                                    cars[i].getPosYVec()->end());
             ImPlot::PushStyleColor(ImPlotCol_Line, SFMLColorToImVec4(cars[i].getBodyColor()));
-            ImPlot::PlotLine(i_str, &(v_axis_crop[0]), &(v_values_crop[0]),
+            ImPlot::PlotLine(std::to_string(i).c_str(), &(v_axis_crop[0]), &(v_values_crop[0]),
                              Config::VELOCITY_ARRAY_SIZE);
             ImPlot::PopStyleColor();
         }
diff --git a/src/Utility.cc b/src/Utility.cc
index 0f32646..9190fe4 100644
--- a/src/Utility.cc
+++ b/src/Utility.cc
@@ -3,7 +3,7 @@
  *
  * @file Utility.cc
  * @authors Jakub Marcowski, Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #include "Utility.h"
@@ -17,9 +17,9 @@ void applyAirResistance(Car car) {
     //
     // F = 3.4 * V^2
     car.getBody()->body->ApplyForceToCenter(
-        b2Vec2(-1.84 * car.getBody()->body->GetLinearVelocity().x *
+        b2Vec2(-sqrt(CarConfig::AIR_RES_FACTOR) * car.getBody()->body->GetLinearVelocity().x *
                    abs(car.getBody()->body->GetLinearVelocity().x),
-               -1.84 * car.getBody()->body->GetLinearVelocity().y *
+               -sqrt(CarConfig::AIR_RES_FACTOR) * car.getBody()->body->GetLinearVelocity().y *
                    abs(car.getBody()->body->GetLinearVelocity().y)),
         true);
 }
diff --git a/src/Utility.h b/src/Utility.h
index ce97133..28f8852 100644
--- a/src/Utility.h
+++ b/src/Utility.h
@@ -3,7 +3,7 @@
  *
  * @file Utility.h
  * @authors Jakub Marcowski, Mateusz Krakowski
- * @date 2023-06-06
+ * @date 2023-06-07
  */
 
 #ifndef UTILITY_H
@@ -19,6 +19,7 @@
 #include "SFML/Graphics.hpp"
 #include "EvolutionaryAlgorithm.h"
 
+#include "../config/CarConfig.h"
 #include "../config/Config.h"
 #include "../config/MapGenConfig.h"
 #include "Car.h"