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diff --git a/3594/CH8/EX8.4/Ex8_4.sce b/3594/CH8/EX8.4/Ex8_4.sce
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+
+clc
+//given
+u=.3
+theta=270*%pi/180
+l=18//in
+a=4//in
+Di=15//in
+Do=21//in
+w=.5//tons
+W=w*2204//lb
+Q=W*Di/Do//required tangential braking force on the drum
+k=%e^(u*theta)//k=T1/T2
+p=Q*a/(l*(k-1))
+printf("Least force required, P = %.f lb",p)