2 files changed, 29 insertions, 0 deletions
diff --git a/3886/CH5/EX5.15/5_15.sce b/3886/CH5/EX5.15/5_15.sce
new file mode 100644
index 000000000..7e544bcd2
--- /dev/null
+++ b/3886/CH5/EX5.15/5_15.sce
@@ -0,0 +1,25 @@
+//minimum weight W to prevent downward motion of 1000N block
+mu1=0.2
+mu2=0.3
+//Refer fig. 5.20
+alpha=atand(3/4)  //degree
+//considering equilibrium of block W
+//N1=W*cosd(alpha)
+//F1=mu2*N1
+//T1=0.84*W
+theta=180  //degree
+//Friction equation of rope gives
+//T2=T1*%e^(mu2*theta)
+//solving
+//T2=2.156*W
+//Consider equilibrium of 1000 N block
+//N2-N1=800
+//N2=0.8*W+800
+//F2=0.3*N2
+//F1+F2+T2-1000*sind(alpha)=0
+//solving we get
+W=(1000*sind(alpha)-240)/(0.24+0.24+2.156)  //N
+printf("\nRequired force is W=%0.2f N",W)
+
+
+
diff --git a/3886/CH5/EX5.15/5_15.txt b/3886/CH5/EX5.15/5_15.txt
new file mode 100644
index 000000000..1eca551dc
--- /dev/null
+++ b/3886/CH5/EX5.15/5_15.txt
@@ -0,0 +1,4 @@
+ 
+--> exec('E:\My program EM\5. Friction\5.15.sce', -1)
+
+Required force is W=136.57 N
+\ No newline at end of file