if a soccer player kicks a ball at an angle of 36 degrees and it lands 31.4 meters away. what is the initial velocity of the ball

Answer 1

hf=hi+vivertical*timeinair- 9.8 time^2

0=0+V*sin36*t-9.8 t^2

so what is time in air.
timeinair= 31.4/Vhorizontal= 31.4/Vcos36

Vsin36*t=9.8t^2
Vsin36=9.8 t

V= 9.8/sin36 * 31.4/Vcos36

V= sqrt (9.8*31.4/sin36cos36)