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diff --git a/Mechanics_of_Materials_by_R._C._Hibbeler/chapter4.ipynb b/Mechanics_of_Materials_by_R._C._Hibbeler/chapter4.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:ff1027836ff09444a0f286e9b3a2446de80c3b84e271ae3db6a9354c2ea33b2b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 4: Shear Forces and Bending Moments"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 4.3, page no. 275"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "import math\n",
+      "\n",
+      "#initialisation\n",
+      "\n",
+      "q = 0.2                     # Uniform load intensity in K/ft\n",
+      "P = 14                      # Concentrated load in k\n",
+      "Ra = 11                     # Reaction at A from wquation of equilibrium\n",
+      "Rb = 9                      # Reaction at B from wquation of equilibrium\n",
+      "\n",
+      "#calculation\n",
+      "V = 11 - 14 - (0.2*15)      # shear force in k\n",
+      "\n",
+      "print \"Shear force at section D\", V, \"k\"\n",
+      "M = (11*15)-(14*6)-(0.2*15*7.5)             # Bending moment in K-ft\n",
+      "print \"Bending moment at section D\", M, \"k-ft\"\n",
+      "V1 = -9+(0.2*15)                            # Shear firce from alternative method in k\n",
+      "M1 = (9*9)-(0.2*7.5*15)                     # Bending moment from alternative method in k-ft"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Shear force at section D -6.0 k\n",
+        "Bending moment at section D 58.5 k-ft\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 4.7"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "import math \n",
+      "\n",
+      "#initialisation\n",
+      "\n",
+      "q = 1                   # Uniform load intensity in k/ft\n",
+      "M0 = 12                 # Couple in k-ft\n",
+      "Rb = 5.25               # Reaction at B in k\n",
+      "Rc = 1.25               # Reaction at C in k\n",
+      "b = 4                   # Length of section AB in ft\n",
+      "\n",
+      "#calculation\n",
+      "\n",
+      "Mb = -(q*(b**2))/2      # Moment acting at B\n",
+      "\n",
+      "#Result\n",
+      "print \"Bending moment at B\", Mb, \"k-ft\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Bending moment at B -8 k-ft\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file