initial commit / add all books

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diff --git a/24/CH9/EX9.1/Example9_1.sce b/24/CH9/EX9.1/Example9_1.sce
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+++ b/24/CH9/EX9.1/Example9_1.sce
@@ -0,0 +1,15 @@
+exec("degree_rad.sci",-1)

+

+//Given that

+m1 = 1.2  //in kg

+m2 = 2.5  //in kg

+m3 = 3.4  //in kg

+a = 140  //in cm

+

+//Sample Problem 9-1

+printf("**Sample Problem 9-1**\n")

+r1 = [0, 0]

+r2 = [a, 0]

+r3 = [a*cos(dtor(60)), a*sin(dtor(60))]

+Rc = (m1*r1 + m2*r2 + m3*r3)/(m1 + m2 + m3)

+printf("The co-ordinate of center of mass are (%f, %f)", Rc(1), Rc(2))
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diff --git a/24/CH9/EX9.1/Example9_1_figure.jpg b/24/CH9/EX9.1/Example9_1_figure.jpg
new file mode 100755
index 000000000..0715bf7bc
--- /dev/null
+++ b/24/CH9/EX9.1/Example9_1_figure.jpg
diff --git a/24/CH9/EX9.1/Example9_1_result.txt b/24/CH9/EX9.1/Example9_1_result.txt
new file mode 100755
index 000000000..8778f9f9b
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+++ b/24/CH9/EX9.1/Example9_1_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-1**

+The co-ordinate of center of mass are (82.816901, 58.060295) 
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diff --git a/24/CH9/EX9.2/Example9_2.sce b/24/CH9/EX9.2/Example9_2.sce
new file mode 100755
index 000000000..79d7e13c6
--- /dev/null
+++ b/24/CH9/EX9.2/Example9_2.sce
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+//Sample Problem 9-2

+printf("**Sample Problem 9-2**\n")

+R = poly(0, 'R')

+//Mass is proportinal to area

+Aw = %pi* (2*R)^2

+Ac = %pi* R^2

+//& the x-co-ordinate of the masses

+CMw = 0

+CMc = -R

+CMf = pdiv((Aw*CMw - Ac*CMc), (Aw - Ac))

+printf("The CM is located at a distace of %fR to the right of the center", horner(CMf, 1))
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diff --git a/24/CH9/EX9.2/Example9_2_result.txt b/24/CH9/EX9.2/Example9_2_result.txt
new file mode 100755
index 000000000..fb4266557
--- /dev/null
+++ b/24/CH9/EX9.2/Example9_2_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-2**

+The CM is located at a distace of 0.333333R to the right of the center 
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diff --git a/24/CH9/EX9.3/Example9_3.sce b/24/CH9/EX9.3/Example9_3.sce
new file mode 100755
index 000000000..752928ae9
--- /dev/null
+++ b/24/CH9/EX9.3/Example9_3.sce
@@ -0,0 +1,14 @@
+exec("degree_rad.sci",-1)

+

+//Given that

+m1 = 4  //in kg

+m2 = 8  //in kg

+m3 = 4  //in kg

+F1 = [-6, 0]

+F2 = [12*cos(dtor(45)), 12*sin(dtor(45))]

+F3 = [14, 0]

+

+//Sample Problem 9-3

+printf("**Sample Problem 9-3**\n")

+aC = (F1 + F2 + F3)/(m1 + m2+ m3)

+printf("The acceleration of center of mass is %fm/s^2 at \nan angle of %f degrees to the positive x-axis", norm(aC), rtod(atan(aC(2)/aC(1))))
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diff --git a/24/CH9/EX9.3/Example9_3_result.txt b/24/CH9/EX9.3/Example9_3_result.txt
new file mode 100755
index 000000000..573ff789b
--- /dev/null
+++ b/24/CH9/EX9.3/Example9_3_result.txt
@@ -0,0 +1,3 @@
+**Sample Problem 9-3**

+The acceleration of center of mass is 1.158805m/s^2 at 

+an angle of 27.235724 degrees to the positive x-axis 
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diff --git a/24/CH9/EX9.4/Example9_4.sce b/24/CH9/EX9.4/Example9_4.sce
new file mode 100755
index 000000000..a8db4e84d
--- /dev/null
+++ b/24/CH9/EX9.4/Example9_4.sce
@@ -0,0 +1,11 @@
+exec("degree_rad.sci",-1)

+

+//Given that

+m = 2.0  //in kg

+v1 = [0, -0.50]

+v2 = [0.40, 0]

+

+//Sample Problem 9-4

+printf("**Sample Problem 9-4**\n")

+deltaP = m* (v2 - v1)

+printf("The change in mometum vactor in kg.m/sec is %1.1fi + %1.1fj", deltaP(1), deltaP(2))
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diff --git a/24/CH9/EX9.4/Example9_4_result.txt b/24/CH9/EX9.4/Example9_4_result.txt
new file mode 100755
index 000000000..f09a76469
--- /dev/null
+++ b/24/CH9/EX9.4/Example9_4_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-4**

+The change in mometum vactor in kg.m/sec is 0.8i + 1.0j 
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diff --git a/24/CH9/EX9.5/Example9_5.sce b/24/CH9/EX9.5/Example9_5.sce
new file mode 100755
index 000000000..9861ad72c
--- /dev/null
+++ b/24/CH9/EX9.5/Example9_5.sce
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+//Given that

+//Before collision

+m = 6  //in kg

+v = 4  //in m/sec

+//After collision

+m1 = 2  //in kg

+

+//Sample Problem 9-5

+printf("**Sample Problem 9-5**\n")

+m2 = m - m1

+v1 = 8.0  //in m/s

+v2 = (m*v - m1*v1)/m2

+printf("The velocity of peiece having mass m2 is %dm/s", v2)
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diff --git a/24/CH9/EX9.5/Example9_5_result.txt b/24/CH9/EX9.5/Example9_5_result.txt
new file mode 100755
index 000000000..ccf8d809b
--- /dev/null
+++ b/24/CH9/EX9.5/Example9_5_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-5**

+The velocity of peiece having mass m2 is 2m/s 
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diff --git a/24/CH9/EX9.6/Example9_6.sce b/24/CH9/EX9.6/Example9_6.sce
new file mode 100755
index 000000000..ae37b0b79
--- /dev/null
+++ b/24/CH9/EX9.6/Example9_6.sce
@@ -0,0 +1,15 @@
+//Given that

+M = 1  //(say)to get the answer directly

+Vi = 2100  //in km/h

+//initial momentum

+Pi = M* Vi

+Vrel = 500  //in km/h

+

+//Sample Problem 9-6

+printf("**Sample Problem 9-6**\n")

+//Assuming Vf as the final velocity of the hauler

+Vf = poly(0, 'Vf')

+Pf = 0.20*M*(Vf - Vrel) + (M - 0.20*M)*Vf

+p = Pi - Pf

+Vf = roots(p)

+printf("The final velocity of the hauler is %dkm/h", Vf)
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diff --git a/24/CH9/EX9.6/Example9_6_result.txt b/24/CH9/EX9.6/Example9_6_result.txt
new file mode 100755
index 000000000..099d15ff7
--- /dev/null
+++ b/24/CH9/EX9.6/Example9_6_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-6**

+The final velocity of the hauler is 2200km/h 
\ No newline at end of file
diff --git a/24/CH9/EX9.7/Example9_7.sce b/24/CH9/EX9.7/Example9_7.sce
new file mode 100755
index 000000000..6b0170ab7
--- /dev/null
+++ b/24/CH9/EX9.7/Example9_7.sce
@@ -0,0 +1,14 @@
+exec("degree_rad.sci",-1)

+

+//Given that

+M = 1  //(say) to directly get the answer

+Mc = 0.30*M

+Vc = [5*cos(dtor(40)), 5*sin(dtor(40))]

+Mb = 0.20*M

+Ma = 0.50*M

+

+//Sample Problem 9-7

+printf("**Sample Problem 9-7**\n")

+deff('[f] = eq_maker(V)', 'f = Ma*V(1)*[cos(dtor(140)),sin(dtor(140))] + Mb*V(2)*[0,-1] + Mc*Vc')

+V= fsolve([0,0], eq_maker)

+printf("The velocity of A is %dm/s & velocity of B is %fm/s after the collision in the given directions", V(1), V(2))
\ No newline at end of file
diff --git a/24/CH9/EX9.7/Example9_7_result.txt b/24/CH9/EX9.7/Example9_7_result.txt
new file mode 100755
index 000000000..f3b7da574
--- /dev/null
+++ b/24/CH9/EX9.7/Example9_7_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-7**

+The velocity of A is 3m/s & velocity of B is 9.641814m/s after the collision in the given directions 
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diff --git a/24/CH9/EX9.8/Example9_8.sce b/24/CH9/EX9.8/Example9_8.sce
new file mode 100755
index 000000000..f33b3fc76
--- /dev/null
+++ b/24/CH9/EX9.8/Example9_8.sce
@@ -0,0 +1,20 @@
+//Given that

+Mi = 850  //in kg

+R = 2.3  //kg/s

+Vrel = 2800  //in kg

+

+//Sample Problem 9-8a

+printf("**Sample Problem 9-8a**\n")

+T = R*Vrel

+printf("The Thrust force rocket engine provide is equal to %dN\n", T)

+

+//Sample Problem 9-8b

+printf("\n**Sample Problem 9-8b**\n")

+a = T/Mi

+printf("The initial acceleration of rocket is %fm/s^2\n", a)

+

+//Sample Problem 9-8c

+printf("\n**Sample Problem 9-8c**\n")

+Mf = 180  //in kg

+Vf = Vrel * log(Mi/Mf)

+printf("The final velocity of the rocket is %fm/s", Vf)
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diff --git a/24/CH9/EX9.8/Example9_8_result.txt b/24/CH9/EX9.8/Example9_8_result.txt
new file mode 100755
index 000000000..82be9570d
--- /dev/null
+++ b/24/CH9/EX9.8/Example9_8_result.txt
@@ -0,0 +1,8 @@
+**Sample Problem 9-8a**

+The Thrust force rocket engine provide is equal to 6439N

+

+**Sample Problem 9-8b**

+The initial acceleration of rocket is 7.576471m/s^2

+

+**Sample Problem 9-8c**

+The final velocity of the rocket is 4346.382596m/s 
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diff --git a/24/CH9/EX9.9/Example9_9.sce b/24/CH9/EX9.9/Example9_9.sce
new file mode 100755
index 000000000..ec1d9625a
--- /dev/null
+++ b/24/CH9/EX9.9/Example9_9.sce
@@ -0,0 +1,12 @@
+//Given that

+m = 4.0* 10^-6  //in kg

+l = 0.77 * 10^-3  //in meter

+h = 0.30  //in m

+g = 9.8  //in m/s^2

+

+//Sample Problem 9-9

+printf("**Sample Problem 9-9**\n")

+//Using Work-Energy theorem

+//F * l = mgh

+F = m* g* h/l

+printf("The external force on the betal is %fN", F)
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diff --git a/24/CH9/EX9.9/Example9_9_result.txt b/24/CH9/EX9.9/Example9_9_result.txt
new file mode 100755
index 000000000..3f838c3ca
--- /dev/null
+++ b/24/CH9/EX9.9/Example9_9_result.txt
@@ -0,0 +1,2 @@
+**Sample Problem 9-9**

+The external force on the betal is 0.015273N 
\ No newline at end of file