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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 23 Kinetics of Rigid Body Work and Energy"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example 23.2 Principle of work and energy for a rigid body"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The distance required to be rolled is 5.501808 m\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "# Initilization of variables\n",
+    "m=600 # kg # mass of the roller\n",
+    "r=0.25 # m # radius of the roller\n",
+    "P=850 # N # Force\n",
+    "v=3 # m/s # velocity to be acquired\n",
+    "theta=30 # degree # angle made by v with the force P\n",
+    "# Calculations\n",
+    "# The distance required to be rolled is given by equating the Work done between positions 1 & 2 as,\n",
+    "x=((3/4)*m*v**2)/(P*math.cos(theta*math.pi/180)) # m\n",
+    "# Results\n",
+    "print('The distance required to be rolled is %f m'%x)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
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+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.5.1"
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+  "widgets": {
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+ "nbformat_minor": 0
+}