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diff --git a/sample_notebooks/NarayaniGurumoorthy/chapter1.ipynb b/sample_notebooks/NarayaniGurumoorthy/chapter1.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:6a31e38d48b33cd2883c4a445f48cd42fa9848c47c13fe5bbf0011e5bf0bde7b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 1:Simple Stresses and Strains"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Problem 1.1, Page no.9"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#Given\n",
+      "#Variable declaration\n",
+      "L=150           #Length of the rod in cm\n",
+      "D=20            #Diameter of the rod in mm\n",
+      "P=20*1000       #Axial pull in N\n",
+      "E=2.0*(10**5)   #Modulus of elasticity in N/(mm**2)\n",
+      "\n",
+      "#Calculation\n",
+      "A=(math.pi/4)*(D**2)    #Area in sq.mm\n",
+      "sigma=P/A               #Stress  \n",
+      "e=sigma/E               #Strain\n",
+      "dL=e*L                  #Elongation\n",
+      "\n",
+      "#Result\n",
+      "print \"sigma =\",round(sigma,3),\"N/mm^2\"\n",
+      "print \"Strain,e =\",round(e,6)\n",
+      "print \"Elongation,dL =\",round(dL,4),\"cm\"\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "sigma = 63.662 N/mm^2\n",
+        "Strain,e = 0.000318\n",
+        "Elongation,dL = 0.0477 cm\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file