2 files changed, 103 insertions, 0 deletions
diff --git a/764/CH12/EX12.2.b/result12_2.txt b/764/CH12/EX12.2.b/result12_2.txt
new file mode 100755
index 000000000..0fd8cbe6e
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+++ b/764/CH12/EX12.2.b/result12_2.txt
@@ -0,0 +1,72 @@
+-->//(Brakes) Example 12.2
+ 
+-->//Total mass of the car m (kg)
+ 
+-->m = 1000
+ m  =
+ 
+    1000.  
+ 
+-->//Moment of inertia of each wheel about its transverse axis I (kg-m2)
+ 
+-->I = 0.5
+ I  =
+ 
+    0.5  
+ 
+-->//Rolling radius of the wheel R (m)
+ 
+-->R = 0.35
+ R  =
+ 
+    0.35  
+ 
+-->//Moment of inertia of other parts of the car Ie (kg-m2)
+ 
+-->Ie = 2.5
+ Ie  =
+ 
+    2.5  
+ 
+-->//Ratio of speed of engine to the speed of wheels r
+ 
+-->r = 5
+ r  =
+ 
+    5.  
+ 
+-->//Speed of the car v1 (km/h)
+ 
+-->v1 = 100
+ v1  =
+ 
+    100.  
+ 
+-->//Car deceleration dec (m/s2)
+ 
+-->dec = 0.5 * 9.81
+ dec  =
+ 
+    4.905  
+ 
+-->//Final speed of the car v2 (km/h)
+ 
+-->v2 = 0
+ v2  =
+ 
+    0.  
+ 
+-->//Number of wheels n
+ 
+-->n = 4
+ n  =
+ 
+    4.  
+ 
+
+Energy absorbed by each brake(E) = 147234.819854 J
+
+Torque capacity of each brake(Mt) = 655.167857 N-m
+
+There is an error in the printed answer
+ 
+\ No newline at end of file
diff --git a/764/CH12/EX12.2.b/solution12_2.sce b/764/CH12/EX12.2.b/solution12_2.sce
new file mode 100755
index 000000000..4a3d4edf6
--- /dev/null
+++ b/764/CH12/EX12.2.b/solution12_2.sce
@@ -0,0 +1,31 @@
+
+//Obtain path of solution file
+path = get_absolute_file_path('solution12_2.sce')
+//Obtain path of data file
+datapath = path + filesep() + 'data12_2.sci'
+//Clear all
+clc
+//Execute the data file
+exec(datapath)
+//Calculate the KE of the car KEcar (J)
+KEcar = 0.5 * m * ((v1*(5/18))^2 - (v2*(5/18))^2)
+//Calculate the initial angular velocity of the wheels w1 (rad/s)
+w1 = ((v1*(5/18))/R)
+//Calculate the final angular velocity of the wheels w2 (rad/s)
+w2 = ((v2*(5/18))/R)
+//Calculate the KE of the wheels KEwheel (J)
+KEwheel = n * 0.5 * I * (w1^2 - w2^2)
+//Calculate the KE of other parts KEother (J)
+KEother = 0.5 * Ie * ((r * w1)^2 - w2^2)
+//Calculate the energy absorbed by each brake E (J)
+E = (KEcar + KEwheel + KEother)/n
+//Calculate the time required to bring the car to the rest t (sec)
+t = ((v1*(5/18)) - (v2*(5/18)))/dec
+//Calculate the average velocity during the braking period wavg (rad/s)
+wavg = (w1 + w2)/2
+//Calculate the torque capacity of each brake Mt (N-m)
+Mt = E/(wavg * t)
+//Print results
+printf("\nEnergy absorbed by each brake(E) = %f J\n",E)
+printf("\nTorque capacity of each brake(Mt) = %f N-m\n",Mt)
+printf("\nThere is an error in the printed answer\n")