diff --git a/include/_circle.h b/include/_circle.h
new file mode 100644
index 0000000..397ccd5
--- /dev/null
+++ b/include/_circle.h
@@ -0,0 +1,22 @@
+#ifndef CIRCLE_H
+#define CIRCLE_H
+
+#include <SFML/Graphics.hpp>
+#include "physics_object.h"
+
+class Circle : public PhysicsObject {
+private:
+    float radius;
+    sf::CircleShape shape;
+    ShapeID ID = ShapeID::CIRCLE_SHAPE;
+
+public:
+    Circle(float r, sf::Vector2f position);
+
+    void update(sf::Time deltaTime) override;
+    void draw(sf::RenderWindow& window) override;
+
+    float getRadius() const;
+};
+
+#endif
diff --git a/include/physics_object.h b/include/physics_object.h
index 5e1e0b2..d0f2dc8 100644
--- a/include/physics_object.h
+++ b/include/physics_object.h
@@ -1,4 +1,6 @@
 #include <SFML/Graphics.hpp>
+#include <SFML/System.hpp>
+#pragma once
 
 struct PhysicalAttributes {
     float mass;
@@ -30,7 +32,7 @@ class PhysicsObject {
     PhysicalAttributes attributes;
 
 public:
-    virtual ~PhysicsObject();
+    virtual ~PhysicsObject() = default;
 
     // virtual get.set;
     // apply force
diff --git a/src/circle.cpp b/src/circle.cpp
new file mode 100644
index 0000000..a981a09
--- /dev/null
+++ b/src/circle.cpp
@@ -0,0 +1,29 @@
+#include "_circle.h"
+
+Circle::Circle(float r, sf::Vector2f pos) : PhysicsObject(pos), radius(r) {
+    shape.setRadius(radius);
+    shape.setOrigin(radius, radius);
+    shape.setPosition(pos);
+}
+
+void Circle::update(sf::Time dt) {
+    sf::Vector2f pos = getPosition();
+    sf::Vector2f vel = getVelocity();
+    sf::Vector2f acc = getAcceleration();
+
+    float dts = dt.asSeconds();
+    pos += vel * dts + acc * (0.5f * dts * dts);
+    vel += acc * dts;
+
+    shape.setPosition(pos);
+    setVelocity(vel);
+    setPosition(pos);
+}
+
+void Circle::draw(sf::RenderWindow& window) {
+    window.draw(shape);
+}
+
+float Circle::getRadius() const {
+    return radius;
+}