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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 13: Principle of Virtual Work"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.1: Application_of_Principle_of_Virtual_Work.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Initilization of variables\n",
+"W=1000 // N // weight to be raised\n",
+"// Calculations\n",
+"// From the Principle of virtual work,\n",
+"P=W/2 // N\n",
+"// Results\n",
+"clc\n",
+"printf('The value of force (i.e P) that can hold the system in equilibrium is %f N \n',P)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.7: Application_of_Principle_of_Virtual_Work.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Initilization of variables\n",
+"P=1000 // N // Force acting at the hinge of the 1st square\n",
+"Q=1000 // N // Force acting at the hinge of the 2nd square\n",
+"// Calculations\n",
+"// Chosing the co-ordinate system with originat A, we can write,\n",
+"theta=45 // degree\n",
+"// Forces that do work are P,Q & X_B. Applying the principle of virtual work & Simplyfying and solving for X_B,\n",
+"X_B=((2*P)/6)*(cosd(theta)/sind(theta)) // N \n",
+"// Now give a virtual angular displacement to the whole frame about end A such that line AB turns by an angle delta_phi.\n",
+"// The force doing work are P,Q&Y_B.Applying the principle of virtual work & Simplyfying this eq'n and solving for Y_B,\n",
+"Y_B=((3*Q)+P)/6 // N\n",
+"// Simply by removing the support at A & replacing it by the reactions X_A & Y_A we can obtain,\n",
+"X_A=X_B // N\n",
+"Y_A=P+Q-Y_B // N\n",
+"// Results\n",
+"clc\n",
+"printf('The Horizontal component of reaction at A (X_A) is %f N \n',X_A)\n",
+"printf('The Vertical component of reaction at A (Y_A) is %f N \n',Y_A)\n",
+"printf('The Horizontal component of reaction at B (X_B) is %f N \n',X_B)\n",
+"printf('The Vertical component of reaction at B (Y_B) is %f N \n',Y_B)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}