A :-) for this question , we should apply
a = v - u by t
Given - u = 4.77 m/s
v = 23.5 m/s
t = 5.18 m/s
Solution -
a = v - u by t
a = 23.5 - 4.77
a = 28.27 m/s^2
.:. The acceleration is 28.27 m/s^2
#8 positive kinetic energy
Work Done = Force x Distance Moved
Work Done = 25 x 15 = 375 Joules
In both magnitude and direction since acceleration is a vector quantity
