Question

An arrow is shot in air,its time of flight is 5 sec,and horizontal range is 200 meters.the inclination of arrow with the horizontal is?

Answer 1

1. R = Xo * T = 200 m. 
Xo*5 = 200 
Xo = 40 m/s. = Hor. component of initial 
velocity. 

2. Tr = T/2 = 5 / 2 = 2.5 s. 

Y = Yo + gt. 
Yo = Y - gt = 0 - (-10)*2.5 = 25 m/s. = 
Ver. component of initial velocity. 

hmax = (Y^2-Yo^2)/2g. 
hmax = (0-(25)^2) / -19.6 = 31.9 m.