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//a rebounding ball
//refer fig.13.19
//at A the vertical component of velocity =u*asind(alpha)
//when h=19 m Vertical component of velocity =0
//y-coordinate of B=-24.033m
//considering the motion in vertically upward direction
t=4.93 //sec
//x-coordinate of B=72.1 m
//considering the horizontal motion of the ball
alpha=atand(19.308/14.625) //degree
u=14.625/cosd(52.86) //m/sec
printf("\nalpha=%.2f degree\nu=%.2f m/sec",alpha,u)
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