initial commit / add all books

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diff --git a/3594/CH2/EX2.1/Ex2_1.sce b/3594/CH2/EX2.1/Ex2_1.sce
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+

+clc

+//a) INELASTIC

+//for sphere 1 ,mass=m1 and initial velocity=u1 

+//for sphere 2 ,mass=m2 and initial velocity=u2

+m1=100//lb

+u1=10//ft/s

+m2=50//lb

+u2=5//ft/s

+v=(m1*u1+m2*u2)/(m1+m2)

+//change in kinetic energy

+//initial kinetic energy = ke1

+ke1=(m1*(u1^2)+m2*(u2^2))/(2*32.2)

+//Kinetic Energy after inelastic colision = ke2

+ke2=((m1+m2)*8.333^2)/(2*32.2)

+//Change in Kinetic Energy =l

+l=ke1-ke2

+//b) Elastic

+// for a very short time bodies will have a common velocity given by v=8.333 ft/s

+// for a very short time bodies will have a common velocity given by v=8.333 ft/s

+//immidiately after impact ends the velocities for both the bodies are given by v1 and v2

+v1=2*v-u1

+v2=2*v-u2

+//c) Coeeficient of Restitution=0.6

+e=0.6

+ve1=(1+e)*v-e*u1

+ve2=(1+e)*v-e*u2

+ke3=(m1*(ve1^2)+m2*(ve2^2))/(2*32.2)

+loss=ke1-ke3

+printf("kinetic energy before collisio0n is %f ft lb\n",ke1)

+printf("\n")

+printf("a) INELASTIC\n")

+printf("\n")

+printf("velocity after collision is %f ft/s\n",v)

+printf("the Kinetic Energy after collision is %f ft lb\n",ke2) 

+printf("the change in Kinetic Energy after collision is %f ft lb\n",l)

+printf("\n")

+printf("b) ELASTIC\n")

+printf("\n")

+printf("velocity of 1 after collision is %f ft/s\n",v1)

+printf("velocity of 2 after collision is %f ft/s\n",v2)

+printf("there is no loss of kinetic energy in case of elastic collision\n")

+printf("\n")

+printf("c) e=0.6\n")

+printf("\n")

+printf("velocity of 1 after collision is %f ft/s\n",ve1)

+printf("velocity of 2 after collision is %f ft/s\n",ve2)

+printf("the Kinetic Energy after collision is %f ft lb\n",ke3) 

+printf("the change in Kinetic Energy after collision is %f ft lb\n",loss)