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diff --git a/3792/CH3/EX3.12/Ex3_12.sce b/3792/CH3/EX3.12/Ex3_12.sce
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+// SAMPLE PROBLEM 3/12
+clc;clear;funcprot(0);
+// Given data
+m=80;// kg
+v=72;// km/h
+s=75;// m
+g=9.81;// The acceleration due to gravity in m/sec^2
+mu_sa=0.30;// The coefficient of static friction 
+mu_ka=0.28;// The coefficient of kinetic friction 
+mu_sb=0.25;// The coefficient of static friction 
+mu_kb=0.20;// The coefficient of kinetic friction 
+
+// Calculation
+// (a)
+a_1=(v/3.6)^2/(2*s);// m/s^2
+F=m*a_1;// The friction force on the block in N
+U_12=F*s;// The work done in J
+printf("\n(a)The work done by the friction force acting on the crate,U_12=%5.0f J (or) %2.0f kJ",U_12,U_12/1000);
+// (b)
+F_1=mu_sb*m*g;// N
+F_2=mu_kb*m*g;// N
+F=F_2;// N
+a=F/m;// The acceleration in m/s^2
+s=(a/a_1)*s;// The displacement of a crate in m
+U_12=F*s;// The work done in J
+printf("\n(b)The work done by the friction force acting on the crate,U_12=%4.0f J (or) %1.2f kJ",U_12,U_12/1000);