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+//CHAPTER 5 ILLUSRTATION 3 PAGE NO 161
+//TITLE:Inertia Force Analysis in Machines
+clc
+clear
+pi=3.141
+D=.3//          Diameter of steam engine in m
+L=.5//          length of stroke in m
+r=L/2
+mR=100//        equivalent of mass of reciprocating parts in kg
+N=200//         speed of engine in rpm
+teeta=45//       angle of inclination of crank in degrees
+p1=1*10^6//        gas pressure in N/m^2
+p2=35*10^3//       back pressure in N/m^2
+n=4//              ratio of crank radius to the length of stroke
+//=================================
+w=2*pi*N/60//           angular speed in rad/s
+Fl=pi/4*D^2*(p1-p2)//     Net load on piston in N
+Fi=mR*w^2*r*(cosd(teeta)+cosd(2*teeta)/(2*n))//   inertia force due to reciprocating parts
+Fp=Fl-Fi//              Piston effort
+T=Fp*r*(sind(teeta)+(sind(2*teeta))/(2*(n^2-(sind(teeta))^2)^.5))
+printf('Piston effort = %.3f N\n Turning moment on the crank shaft = %.3f N-m',Fp,T)