2 files changed, 44 insertions, 0 deletions
diff --git a/3886/CH13/EX13.9/13_9.sce b/3886/CH13/EX13.9/13_9.sce
new file mode 100644
index 000000000..bbde6602b
--- /dev/null
+++ b/3886/CH13/EX13.9/13_9.sce
@@ -0,0 +1,36 @@
+//Bullet fired
+//refer fig. 13.13
+//velocity of projection
+u=(360*1000)/(60*60)  //m/sec
+//(a) total time of flight
+//method 1
+y0=-120  //m
+//considering vertical motion and solving quadratic equation
+t=12.20  //sec
+//method 2
+//t1=(100*sind(30))/(9.81)  //sec
+//maximum height reached in this time
+//h=((100^2)*(sind(30))^2)/(2*9.81)  //m
+//during downward motion
+//t2=7.1  //sec
+//t=t1+t2  //sec
+//method 3
+//time required to travel from A to D
+//t1=10.19  //sec
+//g=9.81  //m/sec^2
+//distance travelled=120 m
+t=12.20 //sec
+//(b) Maximum height reached by the bullet
+//h=((100^2)*(sind(30))^2)/(2*9.81) m above point A
+h=127.42+120  //m above the ground
+//(c)Horizontal range
+Hrange=100*12.2*cosd(30)  //m
+//(d)Velocity of the bullet just before striking the ground
+//vertical component of velocity=69.682 m/sec
+//horizontal component of velocity=86.603 m/sec
+//velocity at strike
+v=sqrt((69.682^2)+(86.603^2))  //m/sec
+theta=atand(69.682/86.603)  //degree
+printf("\nt=%.2f sec\nh=%.2f m above the ground\nHorizontal range=%.2f m\nv=%.2f m/sec\ntheta=%.2f degree",t,h,Hrange,v,theta)
+
+  
diff --git a/3886/CH13/EX13.9/13_9.txt b/3886/CH13/EX13.9/13_9.txt
new file mode 100644
index 000000000..5683f2c41
--- /dev/null
+++ b/3886/CH13/EX13.9/13_9.txt
@@ -0,0 +1,8 @@
+ 
+--> exec('E:\My program EM\13. Projectiles\13.9.sce', -1)
+
+t=12.20 sec
+h=247.42 m above the ground
+Horizontal range=1056.55 m
+v=111.16 m/sec
+theta=38.82 degree
+\ No newline at end of file