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+//CHAPTER 5 ILLUSRTATION 7 PAGE NO 166
+//TITLE:Inertia Force Analysis in Machines
+clc
+clear
+pi=3.141
+D=.25//              diameter of vertical cylinder of steam engine in m
+L=.45//              stroke length in m
+r=L/2
+n=4
+N=360//               speed of the engine in rpm
+teeta=45//            angle of inclination of crank in degrees
+p=1050000//              net pressure in N/m^2
+mR=180//               mass of reciprocating parts in kg
+g=9.81//               acceleration due to gravity
+//========================
+Fl=p*pi*D^2/4//               force on piston due to steam pressure in N
+w=2*pi*N/60//                 angular speed in rad/s
+Fi=mR*w^2*r*(cosd(teeta)+cosd(2*teeta)/(n))//   inertia force due to reciprocating parts in N
+Fp=Fl-Fi+mR*g//              piston effort in N
+phi=asind(sind(teeta)/n)//     angle of inclination of the connecting rod to the line of stroke in degrees
+T=Fp*sind(teeta+phi)/cosd(phi)*r//              torque exerted on crank shaft in N-m
+printf('Effective turning moment on the crank shaft= %.3f N-m',T)