{ "metadata": { "name": "", "signature": "sha256:40aab97a0942d997de9cd8ee539182af9fd67e045ac34df8f9ba65083df3fe50" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "

Chapter_3: Force Torque and Velocity

" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.1, Page Number: 163

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#variable declaration\n", "m1=20 #mass of the body in Kg \n", "a=5 #acceleration in m/s^2\n", "\n", "#calculation\n", "F=m1*a\n", "\n", "#result\n", "print('F = %d Newtons'%F)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "F = 100 Newtons" ] } ], "prompt_number": 6 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.2, Page Number: 163

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#variable declaration\n", "m1=50 #mass of the body in Kg \n", "g1=9.8 #acceleration due to gravity\n", "\n", "#calculation\n", "W2=m1*g1\n", "\n", "#result\n", "print('W = %d Newtons = %d kgf' %(W2,m1))" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "W = 490 Newtons = 50 kgf" ] } ], "prompt_number": 7 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.3, Page Number: 164

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#variable declaration\n", "wt_material=2500.0 #weight of 1 m^3 material\n", "wt_water=1000.0 #weight of 1 m^3 water\n", "\n", "#calculation\n", "spe_grav=wt_material/wt_water\n", "\n", "#result\n", "print('Specific gravity of the material = %.1f' %spe_grav)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Specific gravity of the material = 2.5" ] } ], "prompt_number": 8 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.4, Page Number: 164

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "import math\n", "#variable declaration\n", "L=20.0 # length in cm\n", "W=2000.0 # Weight of mass in gm \n", "db=0.02 # length in cm \n", "Wb=100.0 # Weight of mass in gm \n", "dG=0.5 # length in cm\n", "\n", "#calculation\n", "S=L/(2*W*db+Wb*dG)\n", "fi=0.2\n", "DeltaW=fi*math.pi/(180*S)\n", "\n", "#result\n", "print('S = %.3f rad/g' %S)\n", "print('\\nDeltaW = %.3f g' %DeltaW)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "S = 0.154 rad/g\n", "\n", "DeltaW = 0.023 g" ] } ], "prompt_number": 9 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.5, Page Number: 164

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "import math\n", "\n", "#variable declaration\n", "hp=746.0 # horse power\n", "P=5*hp # Saft power in Watts\n", "N=1500.0 # speed in rpm\n", "\n", "#calculation\n", "n=N/60.0\n", "T=P*60/(2*math.pi*n)\n", "\n", "#result\n", "print('T = %.0f Newton meters' %(math.ceil(T)))" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "T = 1425 Newton meters" ] } ], "prompt_number": 10 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.6, Page Number: 165

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#variable declaration\n", "ch_l=0.075 #change in length\n", "orig_l=50.0 #Original length\n", "\n", "#calculation\n", "S=ch_l/orig_l\n", "E=9.66*10**5\n", "stress=E*S\n", "area=1.5\n", "f=stress*area\n", "\n", "#result\n", "print('Strain = %.4f cm/cm\\nStress =%d kg/cm^2\\nForce = %.1f kg'%(S,stress,f))" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Strain = 0.0015 cm/cm\n", "Stress =1449 kg/cm^2\n", "Force = 2173.5 kg" ] } ], "prompt_number": 11 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.7, Page Number: 165

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "import math\n", "\n", "#(a)\n", "\n", "#variable declaration\n", "R1=120.0 # resistance in Ohm\n", "R2=120.0 # resistance in Ohm\n", "R3=120.0 # resistance in Ohm\n", "R4=120.0 # resistance in Ohm\n", "Rg=100.0 # resistance in Ohm\n", "\n", "#calculation\n", "C=(R1*R2*R4)+(R1*R3*R4)+(R1*R2*R3)+(R2*R3*R4)+(Rg*(R1+R4)*(R2+R3))\n", "C=C/(10**7)\n", "\n", "#result\n", "print('(a)\\nC=%.3f*10^7' %C)\n", "E=10\n", "F=(E*R3*R1*2*10**3)/(C*10**7)\n", "print('\\nF = %.1f *10^3 A/mm = %.1f mA/mm'%(F,F))\n", "\n", "#(b)\n", "\n", "#calculation\n", "Fe=2*10**-4\n", "E=10\n", "DeltaE=Fe*E/(4+4*10**-4)\n", "DeltaE=DeltaE*10**3\n", "\n", "#Result\n", "print('\\n(b)\\nDeltaEg=%.1f mV' %DeltaE)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "(a)\n", "C=1.267*10^7\n", "\n", "F = 22.7 *10^3 A/mm = 22.7 mA/mm\n", "\n", "(b)\n", "DeltaEg=0.5 mV" ] } ], "prompt_number": 12 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.8, PAge Number: 167

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#(a)\n", "import math\n", "\n", "#variable Declaration\n", "r1=2500.0 # Highest flasing rate \n", "r2=1500.0 # next Highest flasing rate \n", "\n", "#calculation\n", "n=(r1*r2)/(r1-r2)\n", "\n", "#result\n", "print('(a)\\nn = %d rpm'%n)\n", "\n", "#(b)\n", "\n", "#variable declaration\n", "N=5.0 # Fift time syncronization for same speed\n", "\n", "#calculation\n", "r5=n*r1/((r1*(N-1))+n)\n", "r5=math.ceil(r5)\n", "\n", "#result\n", "print('\\n(b)\\nr5=%d Flashes/Minute' %r5)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "(a)\n", "n = 3750 rpm\n", "\n", "(b)\n", "r5=682 Flashes/Minute" ] } ], "prompt_number": 13 }, { "cell_type": "markdown", "metadata": {}, "source": [ "

Example 3.9, Page Number: 167

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "#variable declaration\n", "rpm=1500.0 #rotation in rpm\n", "f=200.0 #frequency\n", "\n", "#calculation\n", "N=60*f/rpm\n", "\n", "#result\n", "print('No of teeth on the wheel\\nN=%d' %N)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "No of teeth on the wheel\n", "N=8" ] } ], "prompt_number": 14 } ], "metadata": {} } ] }