His nerves joints and bones control his movement
For the forces to be in equilibrium:
F 1 + F 2 + F 3 + F 4 = 0
i + j + i - j + 9 i + 2 j + F 4 = 0
11 i + 2 j + F 4 = 0
F 4 = - 11 i + 2 j
F 4 = ( -11, - 2 )
Answer:45.24 m/s
Explanation:
Given
Height of Building h=24 m
Range of ball R=100 m
Considering Vertical motion of ball
using 
initial vertical velocity is zero therefore 



Now considering Horizontal Motion

, as there is no horizontal acceleration

That would be the velocity ... speed and direction ... of
the launch out of the cannon.