initial commit / add all books

8 files changed, 105 insertions, 0 deletions

diff --git a/3845/CH8/EX8.1/Ex8_1.sce b/3845/CH8/EX8.1/Ex8_1.sce
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+//Example 8.1

+m=110;//Mass of football player (kg)

+v=8;//Speed (m/s)

+p_player=m*v;//Momentum (kg.m/s)

+printf('a.Momentum of the player = %0.1f kg.m/s',p_player)

+m_ball=0.410;//Mass of the ball (kg)

+v_ball=25;//Velocity of ball (m/s)

+p_ball=m_ball*v_ball;//Momentum of ball (kg.m/s)

+printf('\nb.Ratio of momentum of the player to that of the ball = %0.1f',p_player/p_ball)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH8/EX8.2/Ex8_2.sce b/3845/CH8/EX8.2/Ex8_2.sce
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index 000000000..a324a1744
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+++ b/3845/CH8/EX8.2/Ex8_2.sce
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+//Example 8.2

+m=0.057;//Mass of ball (kg)

+v_i=0;//Initial velocity (m/s)

+v_f=58;//Final velocity (m/s)

+delta_p=m*(v_f-v_i);//Change in momentum (kg.m/s)

+delta_t=5*10^-3;//Duration of contact of ball with racquet (s)

+F_net=delta_p/delta_t;//Net external force (N)

+printf('Average force exerted on the ball by the racquet = %0.1f N',F_net)

+//Answer varies due to round off error

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH8/EX8.3/Ex8_3.sce b/3845/CH8/EX8.3/Ex8_3.sce
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index 000000000..d93ee4a53
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+++ b/3845/CH8/EX8.3/Ex8_3.sce
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+//Example 8.3

+printf('a.Solution is beyond the scope of numerical computation');

+//For (b), the ratio of magnitudes of impulse imparted to the balls = (2*m*u)/(2*m*u*cosd(30))

+theta=30;//Angle (deg)

+r=1/cosd(theta);

+printf('\nb.Ratio of magnitude of impulse exerted on first ball to that on second ball = %0.3f',r)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

+ 

diff --git a/3845/CH8/EX8.4/Ex8_4.sce b/3845/CH8/EX8.4/Ex8_4.sce
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index 000000000..7763c7eb7
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+++ b/3845/CH8/EX8.4/Ex8_4.sce
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+//Example 8.4

+m1=0.500;//Mass of object 1 (kg)

+m2=3.50;//Mass of object 2 (kg)

+v1=4.00;//Initial velocity of object 1 (m/s)

+v2=0;//Initial velocity of object 2 (m/s)

+//Using equations of conservation of momentum and conservation of internal kinetic energy, we can derive a quadratic equation with v1_final as the variable

+//(1/2*m1+1/2*m1^2/m2)v1_final^2-(m1^2/m2*v1)v1_final-(1/2*m1*v1^2-1/2*m1^2/m2*v1^2)

+

+p=[(1/2*m1+1/2*m1^2/m2) -(m1^2/m2*v1) -(1/2*m1*v1^2-1/2*m1^2/m2*v1^2)];//Coefficients of above polynomial

+

+r=roots(p);//Finding the roots of the equation

+if r(1,1)==v1 then 

+    v1_final=r(2,1);

+else 

+    v1_final=r(1,1);

+end//Assigning a meaningful value to final velocity of object 1 (m/s)

+v2_final=m1/m2*(v1-v1_final);//Final value of object 2 from momentum equation (m/s)

+

+printf('Final velocity of object 1 = %0.2f m/s',v1_final)

+printf('\nFinal velocity of object 2 = %0.2f m/s',v2_final)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH8/EX8.5/Ex8_5.sce b/3845/CH8/EX8.5/Ex8_5.sce
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index 000000000..333558b50
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+++ b/3845/CH8/EX8.5/Ex8_5.sce
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+//Example 8.5

+m1=0.150;//Mass of puck (kg)

+m2=70.0;//Mass of goalie (kg)

+v1=35.0;//Initial velocity of puck (m/s)

+v=(m1*v1)/(m1+m2);//Final velocity from conservation of momentum (m/s)

+printf('a.Recoil velocity = %0.2e m/s',v)

+KE_int1=1/2*m1*v1^2;//Internal kinetic energy before collision (J)

+KE_int2=1/2*(m1+m2)*v^2;//Internal kinetic energy after collision (J)

+delta_KE=KE_int2-KE_int1;//Change in internal kinetic energy (J)

+printf('\nb.Change in internal kinetic energy = %0.1f J',delta_KE)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH8/EX8.6/Ex8_6.sce b/3845/CH8/EX8.6/Ex8_6.sce
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index 000000000..59aafc402
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+++ b/3845/CH8/EX8.6/Ex8_6.sce
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+//Example 8.6

+m1=0.350;//Mass of cart 1 and spring (kg)

+m2=0.500;//Mass of cart 2 (kg)

+v1=2.00;//Initial velocity of cart 1 (m/s)

+v2=-0.500;//Initial velocity of cart 2 (m/s)

+v1_final=-4.00;//Final velocity of cart 1 (m/s)

+v2_final=(m1*v1+m2*v2-m1*v1_final)/m2;//Final velocity of cart 2 (m/s)

+printf('a.Final velocity of cart 2 = %0.2f m/s',v2_final)

+KE_int1=(1/2*m1*v1^2)+(1/2*m2*v2^2);//Internal kinetic energy before collision (J)

+KE_int2=(1/2*m1*v1_final^2)+(1/2*m2*v2_final^2);//Internal kinetic energy after collision (J)

+delta_KE=KE_int2-KE_int1;//Change in internal kinetic energy (J)

+printf('\nb.Energy released by the spring = %0.2f J',delta_KE)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

+

diff --git a/3845/CH8/EX8.7/Ex8_7.sce b/3845/CH8/EX8.7/Ex8_7.sce
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index 000000000..12d35b0ed
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+++ b/3845/CH8/EX8.7/Ex8_7.sce
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+//Example 8.7

+m1=0.250;//Mass of object 1 (kg)

+m2=0.400;//Mass of object 2 (kg)

+v1=2.00;//Initial speed of object 1 (m/s)

+v1_final=1.50;//Final speed of object 1 (m/s)

+theta1=45;//Angle of emergence (deg)

+theta2=atand((v1_final*sind(theta1))/(v1_final*cosd(theta1)-v1));//Direction of velocity of object 2 (deg)

+printf('Direction of velocity of object 2 after collision = %0.1f deg\n',theta2)

+if theta2<0 

+    printf('\t\t\t\t\t\t or %0.1f deg',360+theta2)

+end

+v2_final=-(m1/m2)*v1_final*(sind(theta1)/sind(theta2));

+printf('\nMagnitude of velocity of object 2 after collision = %0.3f m/s',v2_final)

+//Answer varies due to round off error

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH8/EX8.8/Ex8_8.sce b/3845/CH8/EX8.8/Ex8_8.sce
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index 000000000..862ca6bfb
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+//Example 8.8

+m=2.80*10^6;//Mass at liftoff (kg)

+delta_m_by_delta_t=1.40*10^4;//Fuel-burn rate (kg/s)

+v_e=2.40*10^3;//Exhaust velocity (m/s)

+g=9.80;//Acceleration due to gravity (m/s^2)

+a=v_e*(delta_m_by_delta_t)/m-g;//Acceleration (m/s^2)

+printf('Initial acceleration = %0.2f m/s^2',a)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest