Answer:
acceleration = 0.2625 m/s²
Explanation:
    acceleration = ( final velocity - initial velocity ) / time
Here the final velocity is  10.6 m/s and initial velocity is 6.4 m/s and time is 16 s.
using the equation:
acceleration =  ( 10.6 - 6.4 ) / 16
                      = 0.2625 m/s²
 
        
                    
             
        
        
        
Explanation:
Starting position at x  = 16m 
Ending position at x  = -25m 
Time of flight  = 4s 
Unknown: 
Distance flown  = ? 
Displacement  = ? 
Speed  = ? 
Velocity  = ? 
Solution: 
To find the distance flown, we should understand that the body is moving on the x - plane;  
   So distance  = 16 + 25  = 41m 
Displacement is 41m to the left or -x axis 
Speed is the distance divided by the time taken; 
       Speed  =  =
   =  = 10.25m/s
   = 10.25m/s 
Velocity is 10.25m/s along -x axis