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+//CHAPTER 3 ILLUSRTATION 5 PAGE NO 105
+//TITLE:FRICTION
+clc
+clear
+//===========================================================================================
+//INPUT DATA
+d=5//                     DIAMETER OF SCREW JACK IN cm
+p=1.25//                  PITCH IN cm
+l=50//                    LENGTH IN cm
+U=.1//                    COEFFICIENT OF FRICTION
+W=20000//                 LOAD IN NEWTONS
+PI=3.147
+//=============================================================================================
+//CALCULATION
+ALPHA=atand(p/(PI*d))
+PY=atand(U)
+P=W*tand(ALPHA+PY)
+P1=P*d/(2*l)
+//=============================================================================================
+//OUTPUT
+printf('THE AMOUNT OF EFFORT NEED TO APPLY =%3.3f N',P1)