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diff --git a/The_Theory_of_Machines_by_T_Bevan/8-Brakes_and_dynamometer.ipynb b/The_Theory_of_Machines_by_T_Bevan/8-Brakes_and_dynamometer.ipynb
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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 8: Brakes and dynamometer"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.1: Braking_trrques.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"clc\n",
+"//given\n",
+"dia=12//in\n",
+"r=dia/2\n",
+"CQ=7//in\n",
+"OC=6//in\n",
+"OH=15//in\n",
+"u=0.3\n",
+"P=100//lb\n",
+"phi=atan(u)\n",
+"x=r*sin(phi)//in inches;radius of friction circle\n",
+"a=5.82//from figure\n",
+"Tb=P*OH*x/a//braking torque\n",
+"printf('\nThe braking torque of the drum Tb= %.2f lb in\n',Tb)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.2: Braking_troque_applied_to_the_drum.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"clc\n",
+"//given\n",
+"\n",
+"OH=15//in\n",
+"l=OH\n",
+"u=0.3\n",
+"P=100//lb\n",
+"phi=atan(u)\n",
+"//according to fig 170(b)\n",
+"//for clockwise rotation\n",
+"a=6//from figure\n",
+"x=r*sin(phi)//in inches;radius of friction circle\n",
+"Tb=P*l*x/a//braking torque on the drum\n",
+"//for counter clockwise rotation\n",
+"a1=5.5//in\n",
+"Tb1=P*l*x/a1//braking torque on the drum\n",
+"//according to figure 172(a)\n",
+"//for clockwise rotation\n",
+"a2=6.48//from figure\n",
+"x=r*sin(phi)//in inches;radius of friction circle\n",
+"Tb2=P*l*x/a2//braking torque on the drum\n",
+"//for counter clockwise rotation\n",
+"a3=6.38//in\n",
+"Tb3=P*l*x/a3//braking torque on the drum\n",
+"T1=ceil(Tb1)\n",
+"T2=ceil(Tb2)\n",
+"T3=ceil(Tb3)\n",
+"printf('\nbraking torque on drum\nWhen dimensions are measured from fig 170(b)\nFor clockwise rotation= %.f lb in\nFor counter clockwise rotation= %.f lb in\nWhen dimensions are measured from fig 171(a)\nFor clockwise rotation= %.f lb in\nFor counter clockwise rotation= %.f lb in',Tb,T1,T2,T3)\n",
+"\n",
+"\n",
+""
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.3: Magnitude_of_force.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"clc\n",
+"//given\n",
+"u=.35\n",
+"Tb=500//lb.ft\n",
+"rd=10//in\n",
+"phi=atan(u)\n",
+"x=rd*sin(phi)\n",
+"//F*OD=R*a=R1*a\n",
+"//R=R1\n",
+"//2*R*x=Tb\n",
+"OD=24//in\n",
+"a=11.5//inches; From figure\n",
+"F=Tb*a*12/(OD*2*x)\n",
+"//from figure\n",
+"HG=4//in\n",
+"GK=12//in\n",
+"HL=12.22//in\n",
+"P=F*HG/GK\n",
+"Fhd=HL*P/HG\n",
+"printf('\na) Magnitude of P = %.f lb',P)\n",
+"printf('\nb) Magnitude of Fhd = %.f lb',Fhd)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.4: force_required_to_support_load.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"clc\n",
+"//given\n",
+"u=.3\n",
+"theta=270*%pi/180\n",
+"l=18//in\n",
+"a=4//in\n",
+"Di=15//in\n",
+"Do=21//in\n",
+"w=.5//tons\n",
+"W=w*2204//lb\n",
+"Q=W*Di/Do//required tangential braking force on the drum\n",
+"k=%e^(u*theta)//k=T1/T2\n",
+"p=Q*a/(l*(k-1))\n",
+"printf('Least force required, P = %.f lb',p)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.5: Effort_applied.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"clc\n",
+"//given\n",
+"n=12\n",
+"u=.28\n",
+"a=4.5//in\n",
+"b=1//in\n",
+"l=21//in\n",
+"r=15//in\n",
+"Tb=4000//lb\n",
+"theta=10*%pi/180\n",
+"//k=Tn/To\n",
+"k=((1+u*tan(theta))/(1-u*tan(theta)))^n\n",
+"Q=Tb*(12/r)\n",
+"P=Q*(a-b*k)/(l*(k-1))//from combining 8.6 with k=e^u*theta\n",
+"printf('The least effort required = P = %.1f lb',P)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.6: minimum_distance.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"//given\n",
+"w=9.5 //ft\n",
+"h= 2 //ft\n",
+"x=4 //ft\n",
+"v=30//mph\n",
+"V=1.46667*v//ft/s\n",
+"u1=.1\n",
+"u2=.6\n",
+"g=32.2//ft/s^2\n",
+"//a) rear wheels braked\n",
+"fa1=(u1*(w-x)*g)/(w+u1*h)\n",
+"fa2=(u2*(w-x)*g)/(w+u2*h)\n",
+"sa1=V^2/(2*fa1)\n",
+"sa2=V^2/(2*fa2)\n",
+"//b) front wheels braked\n",
+"fb1=u1*x*g/(w-u1*h)\n",
+"fb2=u2*x*g/(w-u2*h)\n",
+"sb1=V^2/(2*fb1)\n",
+"sb2=V^2/(2*fb2)\n",
+"//c) All wheels braked\n",
+"fc1=u1*g\n",
+"fc2=u2*g\n",
+"sc1=V^2/(2*fc1)\n",
+"sc2=V^2/(2*fc2)\n",
+"k1=(x+u1*h)/(w-x-u1*h)//Na/Nb\n",
+"k2=(x+u2*h)/(w-x-u2*h)//Na/Nb\n",
+"printf('\nCoefficient of friction = 0.1\na) Minimum distance in which car may be stopped when the rear brakes are applied = %.f ft\nb) Minimum distance in which car may be stopped when the front brakes are applied = %.f ft\nc) Minimum distance in which car may be stopped when all brakes are applied = %.f ft\nCoefficient of friction = 0.6\na) Minimum distance in which car may be stopped when the rear brakes are applied = %.f ft\nb) Minimum distance in which car may be stopped when the front brakes are applied = %.f ft\nc) Minimum distance in which car may be stopped when all brakes are applied = %.f ft\n',sa1,sb1,sc1,sa2,sb2,sc2)\n",
+"printf('Required ration of Na/Nb\nFor u1 = 0.1 -> %.3f\nFor u2 = 0.6 -> %.2f\n',k1,k2)"
+   ]
+   }
+],
+"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
+}