diff --git a/balistique_vcarre.ipynb b/balistique_vcarre.ipynb
new file mode 100644
index 0000000..231f483
--- /dev/null
+++ b/balistique_vcarre.ipynb
@@ -0,0 +1,199 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "43d67ad2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "\n",
+    "# from __future__ import print_function\n",
+    "from ipywidgets import AppLayout, interact, interactive, fixed, interact_manual\n",
+    "import ipywidgets as widgets\n",
+    "import math"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "b1c5ff77",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def graph (v = widgets.FloatSlider(\n",
+    "    value=30,\n",
+    "    min=1,\n",
+    "    max=1000,\n",
+    "    step=0.5,\n",
+    "    description='v_0',\n",
+    "    orientation='horizontal'\n",
+    "\n",
+    "), alphadeg = widgets.FloatSlider(\n",
+    "    value=45,\n",
+    "    min=10,\n",
+    "    max=80,\n",
+    "    step=1,\n",
+    "    description='Angle',\n",
+    "    orientation='horizontal'\n",
+    "),\n",
+    "    rho = widgets.FloatSlider(\n",
+    "    value=1.3,\n",
+    "    min=0,\n",
+    "    max=10.3,\n",
+    "    step=1,\n",
+    "    description='rho',\n",
+    "    orientation='horizontal'\n",
+    "), m = widgets.FloatSlider(\n",
+    "    value=1,\n",
+    "    min=0.1,\n",
+    "    max=10,\n",
+    "    step=0.1,\n",
+    "    description='m',\n",
+    "    orientation='horizontal'\n",
+    ")) :\n",
+    "    g = -9.81\n",
+    "    R = 0.1\n",
+    "    S = math.pi * R**2\n",
+    "    alpha = alphadeg * math.pi/360\n",
+    "\n",
+    "    v0_x = v * math.cos(alpha)\n",
+    "    v0_y = v * math.sin(alpha)\n",
+    "    v1_x = v0_x\n",
+    "    v1_y = v0_y\n",
+    "    v2_x = 0\n",
+    "    v2_y = 0\n",
+    "\n",
+    "    a_fr = 0\n",
+    "\n",
+    "    x0 = 0\n",
+    "    y0 = 0\n",
+    "    x1 = 0\n",
+    "    y1 = 0\n",
+    "    x2 = 0\n",
+    "    y2 = 0\n",
+    "\n",
+    "    x = [x0]\n",
+    "    y = [y0]\n",
+    "\n",
+    "    t = 0.001\n",
+    "    while y2 >= 0:\n",
+    "        x1 = x[-1]\n",
+    "        y1 = y[-1]\n",
+    "    \n",
+    "        vcarre = (v1_x**2 + v1_y**2)\n",
+    "        a_fr= (- 0.5 * 0.47 * rho * S * vcarre)/m\n",
+    "        a_x = a_fr * (v1_x/math.sqrt(vcarre))\n",
+    "        a_y = g + a_fr * (v1_y/math.sqrt(vcarre))\n",
+    "    \n",
+    "        v2_x = a_x * t+ v1_x\n",
+    "        v2_y = a_y * t + v1_y\n",
+    "    \n",
+    "        v1_x = v2_x\n",
+    "        v1_y = v2_y\n",
+    "    \n",
+    "        x2 = v2_x * t + x1\n",
+    "        y2 = v2_y * t + y1\n",
+    "        x.append(x2)\n",
+    "        y.append(y2)\n",
+    "    a = plt.plot(x,y)\n",
+    "    plt.gca().set_xlim(left=0)\n",
+    "    plt.gca().set_ylim(bottom=0)\n",
+    "    plt.rcParams['figure.figsize'] = [3, 3]\n",
+    "    plt.show()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "6b23a5e2",
+   "metadata": {
+    "scrolled": true
+   },
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "829cf50ab73c48b0bdbeb0e445891a04",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "interactive(children=(FloatSlider(value=30.0, description='v_0', max=1000.0, min=1.0, step=0.5), FloatSlider(v…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/plain": [
+       "<function __main__.graph(v=FloatSlider(value=30.0, description='v_0', max=1000.0, min=1.0, step=0.5), alphadeg=FloatSlider(value=45.0, description='Angle', max=80.0, min=10.0, step=1.0), rho=FloatSlider(value=1.3, description='rho', max=10.3, step=1.0), m=FloatSlider(value=1.0, description='m', max=10.0, min=0.1))>"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "interact(graph)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "533b2541",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ef99a1ac",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fa3a35cd",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4c9580c8",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/balistique_vsimple.ipynb b/balistique_vsimple.ipynb
new file mode 100644
index 0000000..8c885af
--- /dev/null
+++ b/balistique_vsimple.ipynb
@@ -0,0 +1,199 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "43d67ad2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "\n",
+    "# from __future__ import print_function\n",
+    "from ipywidgets import AppLayout, interact, interactive, fixed, interact_manual\n",
+    "import ipywidgets as widgets\n",
+    "import math"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "b1c5ff77",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def graph (v = widgets.FloatSlider(\n",
+    "    value=30,\n",
+    "    min=1,\n",
+    "    max=1000,\n",
+    "    step=0.5,\n",
+    "    description='v_0',\n",
+    "    orientation='horizontal'\n",
+    "\n",
+    "), alphadeg = widgets.FloatSlider(\n",
+    "    value=45,\n",
+    "    min=10,\n",
+    "    max=80,\n",
+    "    step=1,\n",
+    "    description='Angle',\n",
+    "    orientation='horizontal'\n",
+    "),\n",
+    "    b = widgets.FloatSlider(\n",
+    "    value=4,\n",
+    "    min=1,\n",
+    "    max=10000,\n",
+    "    step=1,\n",
+    "    description='b * e5',\n",
+    "    orientation='horizontal'\n",
+    "), m = widgets.FloatSlider(\n",
+    "    value=1,\n",
+    "    min=0.1,\n",
+    "    max=10,\n",
+    "    step=0.1,\n",
+    "    description='m',\n",
+    "    orientation='horizontal'\n",
+    ")) :\n",
+    "    g = -9.81\n",
+    "    R = 0.1\n",
+    "    S = math.pi * R**2\n",
+    "    alpha = alphadeg * math.pi/360\n",
+    "\n",
+    "    v0_x = v * math.cos(alpha)\n",
+    "    v0_y = v * math.sin(alpha)\n",
+    "    v1_x = v0_x\n",
+    "    v1_y = v0_y\n",
+    "    v2_x = 0\n",
+    "    v2_y = 0\n",
+    "\n",
+    "    a_fr = 0\n",
+    "\n",
+    "    x0 = 0\n",
+    "    y0 = 0\n",
+    "    x1 = 0\n",
+    "    y1 = 0\n",
+    "    x2 = 0\n",
+    "    y2 = 0\n",
+    "\n",
+    "    x = [x0]\n",
+    "    y = [y0]\n",
+    "\n",
+    "    t = 0.001\n",
+    "    while y2 >= 0:\n",
+    "        x1 = x[-1]\n",
+    "        y1 = y[-1]\n",
+    "    \n",
+    "        vcarre = (v1_x**2 + v1_y**2)\n",
+    "        a_fr= (- 0.00001 * b * math.sqrt(vcarre))/m\n",
+    "        a_x = a_fr * (v1_x/math.sqrt(vcarre))\n",
+    "        a_y = g + a_fr * (v1_y/math.sqrt(vcarre))\n",
+    "    \n",
+    "        v2_x = a_x * t+ v1_x\n",
+    "        v2_y = a_y * t + v1_y\n",
+    "    \n",
+    "        v1_x = v2_x\n",
+    "        v1_y = v2_y\n",
+    "    \n",
+    "        x2 = v2_x * t + x1\n",
+    "        y2 = v2_y * t + y1\n",
+    "        x.append(x2)\n",
+    "        y.append(y2)\n",
+    "    a = plt.plot(x,y)\n",
+    "    plt.gca().set_xlim(left=0)\n",
+    "    plt.gca().set_ylim(bottom=0)\n",
+    "    plt.rcParams['figure.figsize'] = [3, 3]\n",
+    "    plt.show()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "6b23a5e2",
+   "metadata": {
+    "scrolled": true
+   },
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "35e3194ac04141a9bf4972b505280565",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "interactive(children=(FloatSlider(value=30.0, description='v_0', max=1000.0, min=1.0, step=0.5), FloatSlider(v…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/plain": [
+       "<function __main__.graph(v=FloatSlider(value=30.0, description='v_0', max=1000.0, min=1.0, step=0.5), alphadeg=FloatSlider(value=45.0, description='Angle', max=80.0, min=10.0, step=1.0), b=FloatSlider(value=4.0, description='b * e5', max=10000.0, min=1.0, step=1.0), m=FloatSlider(value=1.0, description='m', max=10.0, min=0.1))>"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "interact(graph)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "533b2541",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ef99a1ac",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fa3a35cd",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4c9580c8",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/test.ipynb b/test.ipynb
deleted file mode 100644
index 363fcab..0000000
--- a/test.ipynb
+++ /dev/null
@@ -1,6 +0,0 @@
-{
- "cells": [],
- "metadata": {},
- "nbformat": 4,
- "nbformat_minor": 5
-}