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+//Ball falls vertically
+//refer fig. 18.8
+//Velocity of the ball which striking plane=3*g
+//Component of velocity down the plane=3*g*sind(20)
+//Component of velocity in the line of impact before striking
+//vy=-3*g*cosd(20)
+//velocity after the impact after striking plane
+//vy=2.4*g*cosd(20)
+//Acceleration in the line of impact=-g*cosd(20)
+//Using kinematic equation
+t=4.8 //sec
+//vx=3*g*sind(20)
+//Acceleration in this direction=g*sind(20)
+//Distance travelled in 4.8 sec
+s=(3*9.81*t*sind(20))-((9.81*t*t*sind(20))/(2)) //m The answer provided in the textbook is wrong
+printf("\nt=%.4f sec\ns=%.4f m",t,s)
+