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+clear
+//
+W=500.0 //weight of block
+F1=200.0 //force up the inclined plane when block is moving down
+F2=300.0 //force up the inclined plane when block is at rest
+//When block starts moving down the plane
+//sum of all forces perpendicular to the plane = 0
+//N =Wcoso
+//sum of all forces parallel to the plane = 0
+//Fr+F1=Wsino
+//sino-ucoso=F1/w 1
+//When block starts moving up the plane
+//sum of all forces perpendicular to the plane = 0
+//N =Wcoso
+//sum of all forces parallel to the plane = 0
+//Wsino+Wucoso=F2
+//using these equations
+o=asin((F1*0.5/W)+(F2*0.5/W)) //angle of inclination
+printf("\n Angle of inclination is %0.3f ",o*180/3.14)
+//using 1
+u=sin(o)-F1/W
+printf("\n coefficient of friction is %0.3f ",u)