diff --git a/Makefile b/Makefile
index dd249c9..a45e723 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ CC=g++
 CFLAGS=-Wall -std=c++11
 TARGET=ptf
 
-$(TARGET): build/main.o build/object.o build/physics_object.o build/block.o build/ball.o build/engine.o 
+$(TARGET): build/main.o build/object.o build/physics_object.o build/block.o build/ball.o build/engine.o
 	$(CC) $(CFLAGS) -o build/$(TARGET) \
 	build/main.o build/object.o build/physics_object.o build/block.o \
 	build/ball.o build/engine.o \
diff --git a/engine.cpp b/engine.cpp
index 71a78aa..ad06a1f 100644
--- a/engine.cpp
+++ b/engine.cpp
@@ -86,4 +86,6 @@ void Engine::draw() {
         display_queue.top()->draw(window);
         display_queue.pop();
     }
+
+    window.display();
 }
diff --git a/physics_object.cpp b/physics_object.cpp
index 4d6217b..280da42 100644
--- a/physics_object.cpp
+++ b/physics_object.cpp
@@ -1,9 +1,9 @@
 #include "physics_object.hpp"
 
 void PhysicsObject::update(State state) {
-    sf::Vector2f forces = getForces(state);
-
-    // TODO: intégrer le vecteur force dans la vitesse puis la position
+    sf::Vector2f acceleration = getForces(state) / mass;
+    velocity += acceleration * state.delta;
+    position += velocity * state.delta;
 }
 
 sf::Vector2f PhysicsObject::getVelocity() {