Answer:
(a) No, the acceleration is not constant
(b) Yes, it is constant between 6 s and 12 s
Step-by-step explanation:
Given;
time of motion; t(s) = 0 2 4 6 8 10 12 14 16
velocity (m/s); v = 0 0 2 5 10 15 20 22 22
Average acceleration for t= (2,0) and v = (0,0)

Average acceleration for t = (4, 2) and v = (2,0)

Average acceleration for t = (6, 4) and v = (5,2)

Average acceleration for t = (8, 6) and v = (10,5)

Average acceleration for t = (10, 8) and v = (15,10)

Average acceleration for t = (12,10) and v = (20,15)

Average acceleration for t = (14,12) and v = (22,20)

Average acceleration for t = (22, 22) and v = (16,14)

(a) B. No (The acceleration is not constant)
(b) A. Yes (it is constant between 6 s and 12 s)