If the acceleration in question 8 is constant, what's the average velocity of the object described?

average velocity = initial velocity + 1/2 acceleration* time

Explanation:Q8 unavailable, but at constant acceleration a

if initial velocity is v1, final velocity v2 and average velocity (v1+v2)/2 and the time interval t,

v2 = v1 + at and average velocity = v1 + 1/2at